Free shipping is only free if you keep the product. If you have to return something YOU pay for the return shipping, then they will DEDUCT their inflated and claimed shipping cost from your refund. You may have to call several times for the refund, as I did.
I had my bank reverse the original charge, and then they claimed to have not received the returned product. This is after they refunded me, minus their 'free' shipping charge.
A bad lying, unethical company to avoid.