Very unhappy client

MTN phoned me for an upgrade. I needed a phone for my kid. The current contract I had, was one that I got for my step dad. The lady said that I could use this airtime that I got with the upgrade for myself or anything I wanted. I explained that I want this one for my child, she said I could. When I got the upgrade and the new sim card, I struggled to activate it for almost 3 weeks. I just decided today that I will phone them and make sure that this sim card is activated. They send me from one operator to the next. One even said that I must hold while she spoke to her supervisor because I can't activate the new sim card on this contract and that there's only the old number linked on this contract, not a new one! That's difficult seeing that I agreed to this contract because I needed one for my child with it's own airtime!After I was on hold, she also transferred me to someone else who I had to explain everything to again! AGAIN! I got transferred to someone else! Same story, had to explain everything again. Now they can't put a new nr on my contract and will look into the conversation that day and maybe cancel the contract? I need a contract and new nr! Not misleading info!!