Poor service

Last week Friday 2017/10/20 I tried to do a SIM swap. I bought a new SIM card I call the call centre I spoke with one of the consultants named Nqobile. She assisted me and told me to wait for 24 hours. I did not switch off my phone and I checked after the specified time and the swim swap was not done. I call back again and I spoke with the male consultant he told me sms and I did and he said after 3hours the SIM swap will be done. And after those hours I checked still it was not done. Monday 2017/10/23 I phoned them again and I spoke with Thula she was speaking Zulu she gave me bad attitude and she was rude to me but I asked her to assist me instead she told me that my SIM card was Ricard in 2009 of which i bought it friday at PEP Cell Gugulethu mall. And she told me that i must go and buy another SIM card and i did not do that. I phoned again same day and i spoke with Nicolas and he picked up that the SIM card was ricared friday on the 2017/10/20. And he told me to sms to *173# & option 3 and i did that but still my SIM swap its not done. I am very frustrated because lot of my things are coming through this number. I am very loyal customer to MTN since 1999 and i was using this same number. And now am gona leave MTN and switch to its competitors because of their poor customer service.