Fed up

Bought an item from The Fix online on the 25th of August, tomorrow will mark a third week since I’ve made the purchase. I sent an email last week and was told the item was out of stock while I received an email and sms that the order was out with their courier on the 28th of August. I was told that the refund would be processed within 24-72 hours but still have not received any notification that my refund has been processed. I am so dissatisfied with the incompetence of their online service as this is not the first time I am experiencing this. I want my money back ASAP