Foresight Media Card was charged $99.90. Items were sent back and they will not give a credit back Internet

Wrinkless had a trial offer for skin care. Just pay shipping, which I did.  They sent additional jars to me after trial was over and charged my card for $99.90. I called them and said I was sending back, which I did and paid $60.00 for shipping to get it back in two days. They sent a email saying they received it back.  This all started in December and I called them again and asked when my card would be credited they said we are beind because of the holidays and I would receive it in a few days.  It is now March and I have not got my money back.  I filled a dispute with the credit card company and they notified Foresight media(wrinkless cream) and they told the credit card company it was a legitimate charge. So I am out the money and the product.  How is this legal?