My Facebook Account Has Been Hacked and I Cannot Secure It

I am writing because my Facebook account has been compromised for many days and I need help to secure it. The account is linked to the phone number 019657159** and the email address sujonahmedsurjo**@gmail.com, and it is my personal account. For a long time I have felt that my account is not fully safe and that someone else may have access. I have been trying many times to get full control back and to secure it. Sometimes I can still post from this account, but I am worried that there may be unknown devices, sessions or people connected to it. I also use this Facebook account together with my Free Fire game account with UID 2361660588, so the security of this account is very important to me. I am asking you to secure my Facebook account, remove all unknown devices and sessions, and make sure that only I can access it. I also request that you check if there has been any suspicious activity and help me protect both my Facebook and my connected Free Fire account.