1. Is there a written agreement?
YES = Breach of Trust aka C.B.T.
NO = Cheating.
2. Whichever the ACT is, make sure you have the other party's
particulars,
date of transactions, stipulated cash amount & stipulated
number of goods
units before stepping into the police station. Otherwise, they'll
tell you go
find out the details first.
3. Alternatively, you can seek a lawyer and head to Small Claims
Tribunal and
fight it out in there. Provided you can get the other party to go
along.
4. Irrationally, you may also get a few of us friends and beat the
living
daylights out of his brains. (NOT ADVISABLE)
That's all I have. Good luck.