Useless bunch

So I took out a contract with these guys on the 30th November 2018 and requested a number change. I want to keep my prepaid number which happens to be a telkom number. I was told it takes 72 hours to process, I waited nothing happened. On the 4th December I called their call center and the lady I spoke said, it doesn't appear on their system but she's logging it and it'll be okay in 24 hours. 24 hours later nothing has happened, I call them again and another lady says she is logging it and sent an SMS with a reference number and said all will be done in 72 hours. Guess what? A day later my prepaid sim card stops working and if anyone calls it says the number doesn't exists. It has more than 72 hours now and my prepaid number isn't working, so I call them again. Spoke to some Sizakele lady who also is failing to assist, because their system doesn't work and when you calculate the 72 hours you don't count the day you logged the call...