hacked account

Hi my account has just been hacker. I sent a ticket to Riot and all I got was a very disappointing response, it all happened last night at 11:40 PM (Germany), when I started receiving a lot of emails with a change of email from Riot, I from the beginning I realized that my account was stolen and I chose and decided to make a ticket, in the meantime I changed the email password and realized that someone connected to my email account, I looked and it was really true. now, I entered this server to ask for help because I invested a lot of money in that account, besides it is permanently banned for probably autoclicker, I want you to do a research and help me recover my account, because through tickete nothing was solved and I waited for 12 hours, I want to inform you that I don't think I have either the email, the name or the password to the account, he changed with the email, I want urgent help and if it is possible to check the last ip of on the account that I don't know what happened when I got banned, I didn't use anything, I just struggled to get into diamond, I was accused of hacking and maybe it's just my little friend from Russia who has been struggling for a few days steal my account.