Sorry for the lost RM550 but this "real" Pang Zhen Yang should make police report together with you to prove him not working together with the scammer.

But common sense when selling something & received payment with different description should raised a flag already.

Few years ago I already encounter same situation when selling something.

Received payment with different description, so I dig around to find the actual person who transfer the money.

It took me few days to reach that person & all resolved in good matter. The scammer, as always in-reach-able.