The worst experience with mtn

I've had the most terrible experience with MTN in the last 4 months. From them having to debit my account on the 27th of December for obvious reasons and then they come again on the 31st because apparently my account hadn't been up to date and without my permission and they even had the audacity to cut my line without having to notify me of this....having to get it back on was another issue. Then 2 months passed by then my phone had an issue and I took it in begging of the month of March and this was at the clearwater branch near the food court and I'm told the lady who handles such issues is off , this being a Sunday and I need to bring it in when shes at work being the Monday and I express how that wont work for me as I knock off at 5 and then i'm told that's the same time that the lady does so I ask what am I to do and the gentleman tells me to find another branch. I went to Jabulani and got assisted by a gentleman called Tshepo who then booked my device in and took forever might I add and then he told me Id get a call or email from them with the quote and it may take the phone about over a month he also gave me two numbers to call to find out about the progress of the phone , I told him to go ahead...2 weeks went by without anything third week i called and i'm told that they don't have my device and I called the branch and asked to speak to the manager and he then told me my phone was sent to samsung as that's where they send those and I asked for their number and he wasn't willing to give it to me but eventually he did and I called samsung electronics and only to discover that my phone is on the side as they now waiting for a go ahead from me but they couldn't reach me so they sent the quote to the Jabulani branch and non of them called me , I was quoted an insane amount and then i asked that they return my device, this was now the 18th of March and the lady told me shed book it in to be returned that day and i should have it by the Friday. Friday I went to go check and they told me the device hasn't arrived as yet, Monday the 25th i called but they told me it hasn't arrived only for me to call again the next day and they didn't pick up so i went to go check and still my device hasn't arrived as yet and then I decided to call samsung again and i'm told my device is still with them as it wasn't booked in....This is when i lost it and then the phone cut, called again and spoke to a gentleman named Cleo Kirk who then ensured that my device was booked in and even called me today to confirm that my device should arrive at the store by tomorrow latest by Friday and so we wait and also the branch kept telling me they call me but they failed to call me to tell me about the quote and even the decency to even find out on my behalf as to whats going on with the device. This I must say has to be the worst experience I've had'with mtn and if I ever get anything from them , then that would be the end of me.