3 Months & no refund!

I purchased and returned a pair of sunglasses within a week from the Sunglass Hut within Edgars at Bayside Mall in December. Despite numerous calls and having dealt with a fairly helpful manager, to date no refund has been credited to my account. Called the store again this morning to request proof of refund. No feedback as yet. So now I'm liable to pay a bill for a pair of glasses I don't own? To take back a product, produce a credit note and not actually forward the refund is extremely dishonest. Also what exactly is the point of a contact mailing address on the Sunglass Hut website if no one bothers to get back to you? Pathetic service to say in the least.