Playing Black Ops 1- Went Into Hacked Game Accidently (didn't Realize Until Afte

today in my ps3 I was playing black ops 1. I went in to find a match of capture the flag but I didn't realize until after the game was over that it was a hacked game I just thought the other people were really good- the kind where for every kill you get like 600+ points. I went online to search it up and that's when I realized it's hacked and I can get banned for it. My question is can I get banned and reset for this match even though I didn't know it was hacked until after? I did play on it for like 28 minutes so I guess I should have noticed before but I still don't want to get banned for that. Any advice? Any help would be really helpful. Thanks