@FMOI zylnoi
Do you still have chat logs or messages with this person? Doxing requires already having a fair amount of information on the person. You need something to go off of, such as a list of unique names they go by, catch phrases they are known for saying, links to accounts they have on other websites ... etc. You might be able to get a list of their names from the account's name change history. Or perhaps something from the account's payment history page. Doxing is all about googling the target's already known info, in order to gather additional info that they have posted on other websites across the internet. It is like solving a puzzle without all of the pieces, but you have to start out with at least some of the pieces to find the others.