Refund

I ordered goods from Groupon on October 06, 2015 and paid R999 via EFT. I forwarded proof of payment to the company on the same day. I followed up on the 13th and was informed that they couldn't send me the goods as they received the payment late (even though the deal was still running on the 13th). They also couldn't give me a voucher to enable me to order the same item. <br> <br> I was requested to re-send my banking details and proof of payment in order for them to process my refund ( which I did on the same day).<br> <br> I still haven't received my refund and the calls are not being picked up a their call centre.