False adverti*****t

I ordered a drop in sink from takealot, what was delivered was not a drop in sink. I logged a return a month ago, till now they haven't collected it. I've made several calls to them with no luck. I had to buy a new sink since I was doing my kitchen cupboards. They keep on canceling and rescheduling the collection. I need my money back and I can only get it once they collect. I honestly don't know what more to as I spoke to more than 5 agents who promises to escalate the matter and nothing happens. I asked to their superior and they always tell me they will arrange a callback but I don't receive any call