Pathetic Customer Service for a brand new client

I just switched to MTN and took out a brand new contract with them, unboxed my "NEW" phone at home, and my phone's volume key did not work. I took it back the very next day, as they were closed. It's been more than a week since I've been without a phone, only to find out that it was logged as a repair and is now DOA. This is pathetic, MTN, surely, if a product is faulty and I just started doing business with you, I should be sorted out faster than this. If anything, this issue is your fault and not mine. I then spoke to the salesperson and asked them to cancel my contract, and they said that it will be a long process and I don't want that root. If anything, I will be more frustrated. He then assured me that he would get it sorted, and here we are, no feedback, nothing....Even though I should have my back protected, MTN has chosen to live up to the bad reports I have heard before joining the network. Extremely disappointed. Seems like you thrive on this bad customer service. And seems like the salesperson just needed his commission for the BS excuse as to why I can't cancel, even though you have failed me. Disappointed.