BGMI Account Compromised

My Battlegrounds Mobile India account was hijacked and I have lost access despite my attempts to resolve the issue. First my account received a 7‑day ban. After the ban period ended, when I tried to log in with my Facebook account, instead of opening my existing account the game created a completely new BGMI account. From this situation I suspect that a hacker gained access to my Gmail address and password and changed the recovery details, because I can no longer control or recover that email properly. I contacted both Battlegrounds Mobile India and Facebook support and explained that my old Facebook login should be connected to my original BGMI account. However, the only response I received was to “recover the social network” myself. The hacker appears to have linked a family tree member to that Gmail account, so all my attempts to recover it have failed, even after trying many times. As a result I am stuck with a new account while my original account, linked to the same Facebook login in the past, is inaccessible. I request that my old BGMI account be restored and that my old Facebook login be re‑linked to it. I also request that any other social networks or accounts added by the hacker be unlinked from my game account so that only my own login remains connected. I am ready to provide any additional information you may need to verify ownership of the original account.