A...few things.
1) Don't rage so much. If someone tells you 'you are hacking', tell them you are not. If that is true.
2)If you are, actually hacking, choke on a brick.
3) Consider that the accusers simply lost by a hair. I've won many times by sitting on the opponents hand and not dqing, ghost touching, etc.
4) After a while, just tell them to stop being so butthurt about loosing. If 3) applies, then just admit, 'oh, i got lucky. should have lost. gg.' They might give you more flak about it, but that will satisfy their ego. Atleast until you beat them again.