Steps after committed to suspected auto loan fraud

Hello good day, we were looking for 2nd hand car and found 1 selling (fbmarketplace) the exact unit we want, naginquire like at front acted professionally sila pero sa pagtagal doon lumabas some red flags thanks to their other details I found in the car photos they sent. Pinakaalarming for sure is nagpasa ng documents on them so they can process on financing. Manghihingi na sila reservation fee and at the same time, nakita ko original post na ang inooffer saking car ay sold na several days ago. Decided to back out sa unit na yon at di kaya reserve fee kunwari and doon daw sa walang reserve fee. Slowly backing out para di halata. They don't even have specific units na inoffer sakin for 0 reservation fee. Even made group chat with my documents being sent at the very first, upon checking may password daw (though unlocked lahat) Like that's it red flag na, I'm out.

What steps should I take if someone is using my documents in illegal activities under my name? Thanks.