ANTOnline Atlanta Network Technologies I need to pay for return shipping on their shipping screwup Roswell, Georgia

Ordered two HDD's from ANTOnline through Buy.com.  What I received wasn't even close to what I ordered.  I ordered 2 ea 1Tb, 3.5" SATA 600 drive and received 2 ea 320Mb, 2.5" drives.  I sent an email to them describing what I received vs. what I ordered.  They responded with an email notifying me of the RMA number and that I had to repackage and ship insured to them.  When I balked at having to return their screw up at my expense, response was I had ten days to return the merchandise.  Why don't they just issue a call tag? - response the same - ten days.  So now I'll play with the CC company as they are very good at handling problems. As far as ANTOnline goes, as i say - I've used them twice, the first and last time...