No matter how many games i play my amount of games would not decrease.
Whenever i play a match,my TC becomes 0.I tried reopening tons of times it does not work.

Maybe you play too much games aftereachother and you only get tc in official server those with a color and an official title or at tournaments

This problems happened to me before, go to IRC channel #support and ask for help there.
maybe you are playing yourself or attempted to farming ingame

The TC issue is a glitch. Sometimes that happens to me. I would just ignore it. As for the games, that sounds like a problem with playing too many games. Normally it won't count down if the match ends too fast or if you have already played more than 100 games for the day.

I tried reopening and going to all rooms,the coloured rooms,toureys,quick aikido ,normal ones,but it won't work.And for your info,i just started playing today,a white belt.
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Than you,all the matches i play ends too fast,so it won't work.