Free Fire Guest Account Lost After Phone Change

I am writing regarding my Free Fire guest account which disappeared after I changed my phone on July 16. Previously, I played using a guest account, and after switching devices I can no longer access this account. The details of my lost account are as follows: the account name is "Always|Naa+" and the ID is 4708038557. I have not submitted any prior report about this issue through Garena Support or in-game customer service. I kindly request your assistance to recover this lost guest account so that I can continue playing using my original data and progress.