Good to hear although I cannot see this happening in the usa anytime soon.
*** As for original question
1. Try to deny payment through paypal, whatever
2. You should be able to sell it for half what you paid while be up front about the ban.
It's where I would go with it. If you paid online, with PayPal, open a case with them. Or how ever you paid. unless you paid cash.
If you paid with credit card, contact the bank of the card. If you paid with PayPal, open a case with them. Both will investigate, you might need to ship it back where you got it from but, normally you are protected against fraud, and this would be a clear case of it. If you got it on ebay, open a case with ebay, they will pull the money right of of the sellers account (ebay is pro buyers but treat sellers like crap when it comes to this)
Tell them what happened, you got a PS5 (that is impossible to find these days), so you paid extra just to get one, and found out after you got it that it's banned and you can't use it..