Mtn Sunnypark poor service

I went to MTN Sunnyside on Friday October morning around 10 to request simswap. I explaimed my reason for visiting the store. I was requested to completea form. But the process was not finalised because they said tjey were experiencing netproblem. I was requested to pay for simswap service with the promise that the simswap will be done before 12 of Friday. I was informed to test tje sim card late at night because contract Simswap takes longer. Saturday morning the sim was not registered as per the msg displayed on the phone. I called mtn call centre and informed to restart my phone it did not work. Called the 2nd time and provided with acall centre where they assist with registration. Call centre was closed. Third time when i called i was i formed that no simcard swap appears on the system. Therefore i must re-visit the branch. I called 13 times throughout the day and my call was not answered. I called on Sunday around 9h45 and was informed that they will contact me before lunch time. Is this the service mtn is willing to provide to its client. For sure Mtn failed to brighten my weekend. I have paid for a service and no service has been rendered to me.