Free Fire Guest Account Lost, Need UID Account Recovery

I have been facing a serious problem with my Free Fire account that was previously linked as a guest account. My old Free Fire account with UID 896454379 is no longer visible and I cannot access it anymore. When I try to see this UID in the game now, my old account does not appear. I have been without access to this account for around 3 years. I did not receive any clear information or warning that my account would be removed or become inaccessible, and I had important progress on that account which I do not want to lose. I kindly request that my old Free Fire account with UID 896454379 be recovered and restored so that I can use it again on my current device, or that you provide a clear solution so I can get my old progress back.