What factor does staff depend on to check whether a player is hacking?

Long story short, I played some 1 | 1 bullet games. I lost 2-0 to my opponent before coming back with an 11 consecutive win streak. He suspected me of using engines; I don't understand how he came up with that in mind because we were playing bullet. Nonetheless, he was very, VERY respectful, unlike most people if they suspect anyone of hacking.
So the thing I want to ask is, in the finale games, before I took a rest, I said to him somethings like, "I don't 'really' cheat because these are bullet games" Due to that grammatical mistake "really" I'm kinda worried about staff using that as the only irrefutable evidence. Do they check the game, the accuracy, the time In-between moves,...? Because that will make it clear that I don't hack

Btw I don't know if this is the right category to post this, I'm sorry if it's not

If you're playing fairly you have nothing to worry about

Ty for the relief, I'm over anxious if they use my chat as evidence before anything else

Dont worry. Even if you are using an engine in a clever way, chess com wont do anything. Cheating is getting out of hand in every ELO at the moment. But they will not take measures they will lose alot of customers