ok,let say he's scamming you.but what happen and how much ?
use this to report it :
What happened::

Scammers Profile Link:

Reference Link:
Amount Scammed:
Payment Method:
Proof of Payment:
PM/Chat Logs:
Additional Notes:

before opened a thread about it in scam accusation board,you need to provide some proof or solid evidence.
and before you did a transaction,did you use an escrow for your transaction ?