Half hearted customer service

I have been trying to cancel an item for the past month, I have sent various emails to try and get some customer service to cancel the item and get a refund, if I get some assistance it is half hearted and they don't see it through to solve my problem.

Seeing as I have already payed for the Item I could only cancel after it was out for delivery. As soon as I got the message that it is out for delivery I got in contact with the courier company that handled the delivery and canceled it with them, they sent it back and gave me the tracking number to confirm that it was sent back. I sent an email to takealot to confirm that the item was sent back, they rep**** and confirmed that the item is sent back and asked for my banking details to do a refund, I gave my banking details and got a reply back that said their previous email was incorrect and that the item was delivered. Again I sent an email with the tracking number for the return of the item and tried to get some feedback on the return and refund process, but have not received a reply since.

This was a rather pricey item and as this payment was made with a credit card I am paying interest for each month the money is outstanding, thus they are costing me even more money. I have done my part by returning the item and trying to communicate with takealot and all I want is for takealot to do their part and refund me!