Spanx Slim Cognito Review

I purchased Spanx Slim Cognito Mid Thigh Body Shaper in Feb.  The large was huge on me so I called to do an exchange.  They said they would send a Med and credit me for the return when they received it.  When I didn't get a credit I called several times and was told they may not have processed it yet, try back.  Later I was told that they had changed their customer service company and couldn't look up my order anymore, that they would have to put in a request and someone would call me back within 24-72 hrs.  I called three times and no one ever called me back.  The kicker is that my credit card company can't file a dispute now because they put me off for more than 60 days.  Now I am out the $72 for the return AND out $72 for the medium because even in the correct size I think this product is WORTHLESS!!! Even with the bra loops is falls down and it does not suck me in as well as my other shapers.  Yes, it is more comfortable, but who cares if it doesn't get the job done!!!!!!!!!  DON'T WASTE YOUR MONEY ON THIS PRODUCT AND BE WARRNED IF YOU DO THAT THEY HAVE HORIABLE CUSTOMER SERVICE!!!