ArmyUniverse.com would not give me a refund or exchange of item Gravesend, Brooklyn, New York

This is an inquiry, regarding a Mail-in Order via Money Order to ArmyUniverse.com

MY EMAIL TO ArmyUniverse.com:
Hello,
I received my Order/Order#:2277 today, November 21, 2009 and noticed my Order was incomplete.
Since the Charcoal Gray Fatigue Cap ( Rip-Stop ) is not available...
I would like if you can send me in exchange for your Khaki Fatigue Cap, SKU#:9341, Size:Large /or/ you can send me your City Camouflage Reversible Web Belt, SKU#:4180?
Thank you for your time!!!

THEIR EMAIL TO ME IN RESPONSE:
Kevin,
We will only be able to replace the item for you on the next order. We will not be able to send you one item by itself. Please let us know when you complete your next order so we can apply the credit towards that.
Thanks.

MY EMAIL TO ArmyUniverse.com:
Helllo,
If you cannot send me one item by itself and/or exchange, then send me a cash refund of $4.95.
Thank you for your time!!!

THEIR EMAIL TO ME IN RESPONSE:
We cannot send a cash refund either. You now have a credit with us and can use whenever you please.
Thanks.

MY Email to ArmyUniverse.com:
Hello,
I don't want no credit...send me a refund or I'll report this inquiry to the Better Business Bureau.
Thank you for your time!!!

THEIR EMAIL TO ME IN RESPONSE:
Kevin,
That is our policy with money orders. You have a credit and there is no refunds for money orders.
Thanks.

NOTE: If they did this to other Customers like myself ( I'm for-sure they have ), look how-much money their pocketing???