My 7 Year Old Free Fire Account Was Hacked Please Help Me Recover It

I have been playing Garena Free Fire on my Android phone for around seven years, always logging in through my Facebook account. About one month ago I gave my phone to a friend to play, and after that my Free Fire account was taken over without my permission. My in‑game name was DarkDon and my UID is 1174570455. The name on the account has now been changed and I have lost access to my old account. At the moment, when I log in with my Facebook as before, my old main ID does not open. Instead of my old account, a different new, low‑level account opens and I cannot reach my original profile. This makes me believe that someone has hacked my Free Fire account, changed the binding and taken control of it, even though I am still using the same Facebook login. On this account I had spent a lot of money and effort over the years. In total I had loaded around 1,769 top‑ups and approximately 70,000 diamonds, and this account was very valuable to me both financially and emotionally. I am extremely stressed because my seven‑year‑old account, with all its purchases and progress, is no longer under my control. I am requesting your support to investigate this case, verify that I am the real owner of the Free Fire account with UID 1174570455, and help me recover full access to it. I am ready to provide any additional information or proof you may need so that my account and all items, diamonds and progress can be restored.