Did not receive item, filed dispute, dispute was denied, no option to appeal

[kidchemical]

I purchased an item thru Aliexpress. The tracking said that it was delivered, but I never received a package. I filed a dispute with Paypal, and it was denied. The reason given was that Aliexpress supplied a PDF with a screenshot of the tracking page that reads "delivered." There's no proof that it was actually dropped off at my house. It could've been left literally anywhere. They've provided no real proof and Paypal sided with them.

On the other hand, I supplied evidence thru my doorbell and patio cameras showing that there was no attempted delivery at my house during the period of time listed on the tracking information that THE SELLER PROVIDED. I have ACTUAL PROOF that they did not deliver it to my house, but Paypal denied my dispute anyway. And there is no option to appeal this decision.

The PDF also included a suspicious screenshot of the "shipping label" with my information on it. Not an actual photo of a physical label, but an awkwardly photoshopped digital label. I've read that some scam sellers will find houses for sale in your same zip code and send empty (but weighted) boxes to those houses so that tracking will show it's delivered but you never receive anything. I have a feeling this is what has happened here.

Do I have any recourse? Why am I not allowed to appeal such an obviously wrong decision? Why would Paypal not accept my definitive evidence?

[kidchemical]

@kernowlass 

Sadly, I was unable to.

The courier, Cainiao, is owned by Aliexpress. When I contacted Cainaio, they said that they can only provide information to the seller/shipper. Like, any information whatsoever. They're refusing to help in any way. Cainiao won't even provide me with the last mile delivery service they used. And if you use any of the tracking info sites for overseas deliveries, it's completely obfuscated so that none of that info is discernible.

I was able to confirm with USPS, Fedex, and UPS that they were not the last mile couriers. It must be a smaller company and there are too many to call them all.

Also, Aliexpress partially deactivated my account when I filed the dispute with Paypal. So, I'm very limited on what I can do on there now, including accessing any information whatsoever related to this order (all options are greyed out).

Really great company. Won't be using them ever again.

[icher]

"I've read that some scam sellers will find houses for sale in your same zip code and send empty (but weighted) boxes to those houses so that tracking will show it's delivered but you never receive anything. I have a feeling this is what has happened here." 

After I elevated the case from the seller (BillTools Store, 4.8*) to AliExpress, the seller provided "delivery proof", which (according to the USPS investigation; I contacted USPS and independently their OIG) was with a real tracking number for a real delivery of an "empty box" (2oz)  to a house with the same zip code (I have). The seller changed the name, the address (to my one), forged my signature (which was not required for this mail), changed the weight to 5.6kg; however, left the delivery day-time and the post office (not mine) unchaged.  According to what I read below, such "proofs" are mostly processed automatically; the post office and the delivery date, probably,  must match the tracking number. Obviously, they knew well what they were doing. AliExpress followed the seller and rejected my claim; now it is in the hands of PayPal. Any thoughts?

[icher]

"I've read that some scam sellers will find houses for sale in your same zip code and send empty (but weighted) boxes to those houses so that tracking will show it's delivered but you never receive anything. I have a feeling this is what has happened here." In my case, the seller (BillTool Store 4.8*) provided, after I elevated the dispute with them to AliExpress, "proof of delivery" with a tracking number for an "empty box" (2oz) sent to a different address (though with the same zip code), where the name and address were changed to my ones, my signature was added and forged, the weight was changed to 5.6kg. According to what others wrote, such "proofs" are processed mostly electronically; indeed, the post office, date-time remained unchaged (they knew what they were doing). This is based on the USPS (written) reponse; I filed the case with USPS and USPS-OIG.   Now it is in the hands of PayPal (with 100% proof of forgery); we will see. Generally, the counterparts of AliExpress are good in China and AliPay is a must to have, but they seem relaxed abroad. AliExpress followed the seller and rejected my claim. Any thoughts, please?