I just got chargebacked on paypal(sad)

[xSaoLx]

I sold a guy an account and my money was on hold for a while. After like 10 days(?) he claimed that the account was recovered(it wasnt) and he demanded the money. I proved him I didnt recover and he chargebacked. Problem is that it was not on sellix or any website with receipts so im kinda fucked. Also in the description he wrote "logitech g pro mouse" to probably make it seem like I delivered a physical item.
Does anyone know how to resolve this? Does paypal do anything with a negative balance account?