possible time cheats

There's no such thing as the so-called "time cheating". It's lag, nothing else. These links might be able to help you. 

https://support.chess.com/customer/portal/articles/1444876-what-is-lag-and-what-are-the-colored-lag-indicators-in-live-chess-

https://support.chess.com/customer/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-

https://support.chess.com/customer/portal/articles/1444849-why-did-the-clock-times-suddenly-change-the-clocks-seem-broken-

This is not true ForeverHoldYourPiece !!! How can I report time-cheater? I looked at my opponent's time going up and up again in increments of 10 sec. in a totally lost position. Now I know why he played till the end. And won on time of course. 

lol

Please refer to the other 867,794,630,428,971,261,230 post on cheating

https://www.chess.com/forum/search?keyword=cheating

"As far as time cheating goes, they can say its impossible all they want.  NOTHING, and I mean NOTHING is impossible.  If people can hack credit card companies, banks, and government institutions.......... they can certainly hack chess.com!! "

H'mm, but what about their motivation ? Hacking credit card companies looks interesting, doesn't it ? But hacking a chess game... I'm very skeptical.