looks like you're new to Thailand, so I'll give you some advise, just move on.
You can keep going back and hope you get something, but most likely it's a dead issue for them.
It's even possible they met with the scammer and the scammer paid them to make it go away and they will wait for you to give up.
When I fist moved to Thailand this happened. My girlfriend's sister got into a fight with a neighbor and she was taken to jail, Later that night we got a call from the police that 30K THB and they will let her out of jail and make things go away. We paid she go out that night and that was the end of it.
I've seen this happen a few times over the year. I'm not saying all the cops are bad, but they are very corrupt and most of the time if there is no money for them, then nothing is going to happen.