Got u, thanks for all answers...
I have only recommendation to include in forum rules 1 small paragraph - Users allowed to sell their accounts only assigned with btc address and with access to private keys. This small thing could avoid lots of similar situations, big losses of newbie member etc. Easy, don't u think?
thanks.

p.s.
How can I assign my account with my bitcoin address, is it in settings section - in account info just put my address? Is that enough?
If I would buy account not connected with any bitcoin I should put my address of btc - and thats guarantee my own rights for acct, correct Sir ?