Garena Free Fire Locked Me Out of My Account After Unauthorized Purchases

I have been playing Garena Free Fire on my Huawei L9 Plus, logging in with my email, and my in‑game name is “beginner%18”. Until this evening the game always loaded directly into my account, but now when I try to open Free Fire it only shows a “sign in with Facebook” screen and never enters my existing account anymore. I did not change my device, did not reinstall the game, and did not log out anywhere, so this sudden loss of access is very confusing for me. Before this happened, it seemed like someone was taking money from my account for diamonds that I did not buy or authorize. I wanted to take action about these unauthorized purchases, but the game did not close properly, so I continued playing. Then my phone battery went down, and after charging and coming back to the game, I could no longer access my account. I am requesting your support to restore full access to my Free Fire account linked to my email on my Huawei L9 Plus, with the in‑game name “beginner%18”. I also ask that you check my account for any unauthorized diamond purchases and help me secure the account so this does not happen again. I would like to continue using my original account and not lose my game progress.