HIFI Corp worst service on earth

I will never buy anything at HIFI Corp, I would rather not have it then buy it at HIFI Corp. I bought something on line during black Friday, on their website, it said I can collect at any shop, so I went to the shop to collect and I was refused my Item, in frustration I went to buy the same Item at Makro with hopes that I will cancel the order at HIFI Corp. I phoned the helpline on the Monday the 27th November 2017 to cancel the order and i was assured that it will take 3- 7 days but it will be cancelled. after a week with no refund I called again at which time I was told I need to log a complain and I told them I just want to cancel and get my money back. today is Monday the 11th 2017, HIFI Corp still has the product and still has my money. The straw that broke my back was when I called today for the second time to try and get someone to help me, after holding the line for several minutes listening to the answering machine saying they are experiencing a high call volume, some one actually picked up and ended my call. HIFI Corp please improve your customer service. customers are the reason you are in business