Edit: I thought the seller giving me the btc addresses with private keys so I don't need to stake new address and sign new message, I thought that doing this can make my account shady and get negative feedback for buying account.
Using your own logic and combining it with everything you've disclosed here, your account is going to be tagged even if your unbanned (not likely), so its not worth arguing. Stop buying accounts and you won't have to deal with these issues.
You just signed a message from an address that was posted on May March 19.....
FTFY
I think you should work on your months. It doesn't seem to be one of your strengths.
