i need to know becaues ive won like 80 games now, but i havent got any TC and every time i exit and go back in im back to white belt!

Err... wtf? Its meant 2 save automatically.

Make sure you are in a official server where you can earn tc

The fact that you don't earn qi might be because you have played games shorter than two or three rounds, can't quite remember. That's very often the case in judo. This causes you to get no qi or TC, as an anti-farming act.