Paypal Ripped off again by Paypal, Internet

Paypal as usual trying to rip off internet vendor account holders. A customer buys a product and agrees to the sales agreement during the check out process. The product is shipped and delivered with signature approval.
The customer accepts delivery and decides 120 days later they don't want the product, even though the terms of sale say 30 days money back guarantee.

The vendor refunds the money by check anyway because it is past the 60 day Paypal refund time limit. The customer cashes the check and then files a claim against the vendor for a credit card refund. The charge back is put against the vendor's account  and the funds are taken out of the account. Now the vendor proves with copies of the cashed check and the sales agreement that the customer has been reimbursed and the charge back is settled and the funds are returned to the vendors account "30 DAYS LATER".
The vendor  [my company] now says enough of this and closes the Paypal account with no disputes and a positive Paypal account balance and it was now 4 months since the last active customer purchase on the Paypal account. It is now 6 months later and Paypal starts calling daily at all hours using a computer generated calling program asking for the vendor.

Keep in mind the Paypal account has been now closed for 6 months and the last transaction was 10 months ago. The customer who was reimbursed has filed again for a credit card refund. For the same transaction that they were denied before after Paypal took the vendor's funds and the vendor had to prove that the customer had been reimbursed.
Now Paypal says "either you pay this money or we will send it to a collection agency". As explained to the paypal representative that that transaction had been already resolved and that this was an already settled issue and the customer was trying to collect a second time. Paypal said again well unless you pay this charge back to us we will send it to a collection agency.

Personally, I hope that they do, that will give me the opportunity to turn them into the banking and finance dept here in the state of Georgia and file a complaint with the state's internet fraud department for illegal banking and internet business practices.
Oh and by the way, I never received the final balance on my account from Paypal by check as stated in their terms of service. "NOW THATS BEING RIPPED OFF"!!!