Refund for transaction with non-functional seller

[obelix99]

I have purchased something from a non-functioning website. The website used to operate in the early 2010s I assume, but since no one took care of it, it seems as if all the items are available, whereas when i tried contacting them through the email, I received a failure to send an email as the email address was no longer in use. 
I tried to get a refund through an unauthorized transaction, but can no longer appeal this as the matter has been 'resolved'. the website automatically sends emails when u confirm payment or when it's cancelled and i have proof of both. What can I do to get a refund? Thank you

[kernowlass]

@obelix99 

A dispute for an unauthorised transaction is telling paypal that your account was hacked and used without your consent to make that transaction.
Paypal would check IP addresses and devices and close the dispute if it was you that made the transaction.

You are only allowed 1 dispute per transaction so the only way you can get a second dispute opened is to contact Paypal (when and if you can) and see if they will open a second dispute for you.
They may decline citing policies but if you say you made a mistake then they might open a second dispute for you.

If not then if you funded your paypal payment via a credit card then consider contacting your card issuer and see if they will help you with a chargeback?