people keep cheating aganst me they play like a computer they reck me every time
Fraud

I'm not 100% certain on this but if you leave the Live game screen on iOS, while the server has the game in progress, it will resign the game. I'm not sure if that also impacts Android or not.
In this particular case, it sounds like you actually got disconnected, but for whatever reason your client didn't recognize that and thought your opponent disconnected. When you left the game screen, the server received that notification and marked the game resigned.
I've seen a number of similar topics and it does seem to be a bug, at least as far as how the system isn't correctly acknowledging disconnects. I'm also not sure why leaving the game screen causes a resignation.
Here is the geme I was playing
[Site "Chess.com iPhone"]
[Date "04/17/2016 02:31"]
[White "lu4 (1293)"]
[Black "Roku80 (1216)"]
1.e4 e5 2.Bc4 Nf6 3.Nf3 d6 4.Ng5 Qe7 5.Bxf7 Kd8 6.Nc3 c6 7.d4 h6 8.dxe5 hxg5 9.exf6 Qxf7 10.Bxg5 gxf6 11.Bf4 Qe6 12.Qd3 Bd7 13.O-O-O Kc7 14.Rd2 Bh6 15.Bxh6 Rxh6 16.Rhd1 f5 17.exf5 {Roku80 won by resignation}