HAVING TROUBLE WITH MTN AGAIN...

I am fed up with MTN! It has been an absolute nightmare trying to allocate my payments and do a simple upgrade. They didn't deduct a debit order for last month. So at the beginning of May I made a payment via the MTN app. I phoned them on the day I made the payment, telling them that I am making a payment, they should allocate it to my account. Today when I opened my statement for May, I saw that the allocation has still not been made???? Furthermore, I've been struggling to do an upgrade from the beginning of April. they kept on telling me someone will phone me. After a month and a half, one of their consultants did phone me. I wanted to upgrade to a Hp or Lenovo A4 AMD notebook. So he told me that they have the Lenovo A4 AMD slim Ideapad. I specifically asked him what the difference was between the Lenovo A4 AMD notebook and the Lenovo A4 AMD Slim Ideapad. He told me there was no difference the Slim Ideapad was only thinner than the normal Notebook. So I took the Slim Ideapad, under the impression that it was, as per the consultant "exactly the same just thinner" than the normal notebook. After I got home from work, I went on google and looked up the Slim Ideapad, only to find out that it was not as similar to the normal notebook I wanted as he said it was. It wasn't what I wanted at all. So the next day I contacted MTN again telling them that I want to cancel the Ideapad and upgrade to the normal notebook. Again they told me 5 - 7 working days for the cancelation to be done. The courier company phoned me in the meantime for the delivery of the Ideapad. I told them to cancel the delivery as I canceled it with MTN Direct. We are past 7 days AGAIN and still, no feedback was given. I phoned them again today and like all the previous times, they took my details and told me they will phone me back... It seems like this is yet again one of those problems with which I will be struggling with for months to come?!