returns and exchanges

Three months ago, I ordered a batch of maternity clothes from the Gap and Motherhood Maternity. Unfortunately, when I returned the pieces that didn’t fit – I mixed up the returns! The Gap immediately returned the shipment meant for Motherhood, but Motherhood did not. In emails they have claimed to have 1. never received it (I sent the UPS delivering confirmation), then they claimed to have sent it back (I asked for tracking info what was never supplied), then they just quit answering emails. I reported them to the BBB saying – yes, this was my mistake but they still should have returned it – and they told the BBB that no proof was every supplied that the items were sent to them (I resent the email thread and the delivery confirmation).