Instagram Blocked My Account and Sent a Password Reset to an Unknown Gmail

I haven't logged into my Instagram account for a long time. One of the contents I shared was copyrighted. I entered the DM around 23.50 at night and said, "One of the contents in your account is copyrighted. To see which one, go to the link below to file a complaint and fill in the required information." When I entered, it just redirected me to my page. However, when I wanted to log in again, I encountered the error "Your password is incorrect". When I tried to renew it, it sent an e-mail to a Gmail account that does not belong to me. 1-My account was closed unfairly. 2-My account may have been stolen, but I worked for months to grow this account. 3-I don't think I have copyrighted content.