Hi Hjortfot, yes I've only been here 10 minutes compared to some people, I'm not sure if this General Chess Discussion is the right place to discuss this?, (there is a Cheating Forum - Chess Club - Chess.com
https://www.chess.com/club/cheating-forum).
You can block & report them, making it impossible for them to play you again.
I do know that Cc do take this matter seriously & they have got effective detection control measures in place, check to be sure that they're cheating/sandbagging and then report Chess.com | Contact Chess.com Support https://support.chess.com/customer/portal/emails/new.
Sandbagging: I've seen players suspended for a month & their points stripped back to beginner level, some have an extra account to facilitate this, which is cheating for which I've seen loads of people 🚫banned!
So don't get mad, get even
I have been away for over a year from this site. I see that much has changed, but not for the better I am afraid. Still this site is full of sandbaggers playing with a ranking at least 200 below their real skills.
And your efforts to get me to pay money for this has increased!
No, I will not EVER pay for chess not playing fair! When will u ever understand that?
There is a ranking in almost all sports for a reason, keep it like that. My trust for this site has now gone below my imagination.