Thank you for your reply. Their answer was: "We do not support BSC USDT/USDC. So please be more careful next time".. i don't know what to do to make them take care of my problem..
I know i have to be careful, i tried to read as many info i could, but i am not an expert. i can't understand why transaction went trough if one exchange does not support this network :/
thank you very much again for your time..