happened to me often...i met players that not move for 10 minutes or offering a draws for 10 times in a losing position.......
if accousing you, trollation during a game or give you bad words, make screenshots of the chat and report to chess.com support
i found a very rude person i was playing with and he saw i played good so acused me of loosing to take my rating down on purpose and no matter how hard i tried to tell him i wasnt he kept accusing me and he acuses ANYONE GOOD bellow 1000 of doing this and i have autism and this made me very upset and angry and i was wondering if i can report him somehow and no matter how much i told him he was wrong he wouldnt stop and i didn't like it