You can take whatever actions you want to.
It's unclear to me how you go to him claiming nothing will happen because the account is your personal account and then when he has an issue that requires you to provide information you say you don't have it because it's not real information. You should have clarified this before purchase and not now, when the account is locked. What difference does it make that it's your personal account if you have no idea what information you put in. Makes no sense that you advertised it as a personal account and now that he has an issue with personal information of the account you claim it's not your problem.
Please find the way to make it up to him for the remaining balance he won't be able to use. Which I believe is 130$. I dont think it's necessary to tell you how wrong your logic is regarding your liability on this matter, you are saying you are not responsible simply because he changed the accounts information, yet you are the seller and owner of the account, and if anyone can recover it, that's you.