Call QVC Customer Service and ask them to send a copy of the packing slip via USPS mail (if you don't have a printer). It takes about 7-10 days. Then use that as your packing slip, mail the package with your OWN address label to QVC at the Post Office (where you'll receive a Tracking Label) and in 2-3 days you'll be able to contact QVC to make sure they have NOT billed you for return S&H and to issue a CREDIT to your credit card. I do it!
ETA: This is especially handy when returning more than one item. Put them all in one package and return at once for one postal charge. It's quick and works well at a reasonable price IMO.
Money screams; wealth whispers.