How do I request funds from someone without an email?

[ArfArftheDawg]

Ebay doesnt provide an email anymore, nor any kind of contact between buyer and seller.

And now paypal doesnt provide an email within the transaction.

I miscalculated postage -- I put in 4 ounces into the listing and not 4 lbs.  I messaged buyer with apologies and asked if he would pay the extra funds or if he wanted me to cancel the transaction.  He totally understood my dilemma and agreed to pay the extra funds.  But now I cannot invoice him via EBay, nor make a request via Paypal.  It says type in a name, an email, or mobile number, but it ignores when I type in his name, be it his real name or his eBay name.

So I copied the email address on messages sent to my home mail inbox:  ending with atsign members.ebay.com....  

Will he get the request?

Is there a way to do this?

Any help appreciated.

[ArfArftheDawg]

PS, Here is what Paypal says: "The email address you use with Paypal identifies your Paypal account and is all someone needs to pay you.
Or you can send a money request/invoice from your Paypal account to their Paypal email address for them to pay."

SO where do we get this email address????

Arrgghh.,

[kernowlass]

@ArfArftheDawg 

well normally you log in to your paypal account with it ???