@Olderthanbefore2 said in #1:
> [...] Can you also please restore those rating points I lost in that game? [...]
The reason why only the rating points of the cheating player's most recent games are refunded to players with non-provisional ratings which did not themselves progress too far following playing the cheating player (see FAQ which odoaker2015 links in #5) is that refunding other ratings in full would have a negative effect on the accuracy of the ratings as a whole.
Basically, ratings converge to what they should be by themselves. "Refunding" all points lost by the opponents of the cheating player would then over-compensate. Ratings need to be a measure of the skills of the individual players and kept as accurate as they can be.
If losing to that cheating player has caused your rating to be temporarily too low, it will soon recover to what it should be when you play more games.