I am sorry, but a quick look at their web page finds that their returns policy clearly states
"We will not refund shipping cost"
so i dont think you stand much chance of getting them refunded.
I have not ordered anything from them, but generally during the ordering process online you are given the option of reading the terms and conditions, and told that placing an order is deemed to show that you agree to be bound by the terms and conditions. In effect by ordering from them you have agreed that you are liable for the cost of shipping it back if it is duff.
Unless any one else knows better of course.