I got hacked but the hackers are stupido

Hello the Valorant Discord, last night my Valorant account, which I've been using for a year and a half, was hacked. I was s3 ≃90rr. I played my last game at 6 p.m. This morning I played again, I lost a game and was deranked s2. I went to check my career and saw that they played 4 games of fives for deranking (off in the 5th round). I rushed to change my password, and how to login...In the middle of the afternoon (today), I told my friends about it and they told me there was a Valorant Discord server for deranks, boosts, etc. They went to see if my username was in some messages, and it turned out that it was, and they were the same usernames as in the fives of my career. I don't know what to do even though I took all the precautions, I don't know how they hacked me or anything but I'm still grateful that I still have my account. I just want some advice please thank you !