extreme inconvenience caused by mtn

i upgraded my cell phone yesterday, a sim swap needed to be done and I was advised that it would be activated 2 hours later, I then called the call centre approximately 5 hours later as it still wasn't activated, the lady who assisted me was not helpful at all but advised me of a turn around time of 24hrs and said my sim card would be active in the morning, this morning my phone was still not active and I called the call centre again, I was then advised that it would be activated at any given moment and waited patiently.. it is now well over 24 hours and my phone still hasn't been activated, I'm extremely unhappy because this has been a great inconvenience to me , I'm really disappointed in mtn as this is the first time I'm experiencing such poor service from them a loyal customer :(