Worst service ever. How is Matress Warehouse still standing

Very poor service, did an online order, delivery said 3-5 working days, no one called me to arrange delivery. When I tried to phone the Port Elizabeth branch, no answer on the Saturday and the Sunday. Eventually Monday morning hit hold of the store and gentleman said he would phone me back. He did not so I phoned back on the Wednesday and finally got hold of the manager who said she would get back to me, hit word that the matress was on its way, the next day delivery was done however the wrong size Matress a double instead of Queen. I was told that the divisional manager would call me to arrange a replacement. No phone call it’s been 5 days and still no phone call. I sent messages to manager to find out when I will get my Matress, I was told to use the double and that they will let me know. Still no response from the company or manager. My messages are bing ignored and again today the phone just rings. How is this company still operating! Worst experience ever! So quick to take money online but no service thereafter