A very unhappy client

I was due for a MTN contract upgrade from the 1st of February 2018. I upgraded on the 2nd of February over the ph with the point of sales dept, consultant's name Granny. I took the 2 for 1 deal which is the Samsung j5 prime and the Samsung Galaxy TabE which comes with an extra sim for the free 500MB. She sent me the extra sim but with the incorrect hand set on the 7th of February. I called her the same day and complained. I was advised to take the hand sets to an MTN direct store which I did but they refused to take it for security reasons, fair enough. I called them back and I was told that they will fetch it. The hand sets and sim were only collected on the 20th of February after I made numerous ph calls and spoke to 8 different people. I even asked to speak to their supervisor Tiny Tsele. She refused to talk to me or even call me back. After I made a lot of noise on the 17th of February she spoke to me and promised to have it fetched. I then asked her to cancel my upgrade because I wanted to go directly to the store to upgrade. I went in to MTN direct store at The Mall of the South on the 21st of February upgraded with consultant named Rose. I received the hand sets but not the sim card. I was told it has to be approved. Till date it has not been approved and she cannot give me an answer as to why. I don't understand what's the hold up because a extra sim was sent to me the first time. It's, not like I am taking a new contract, I am not even going to pay anything extra for that sim card. I called 808 and spoke to 3 different people, and they said that it's unusual for it to take so long. Every time I call the store Rose is not available and she does not call me back or follow up. I've used up all my air time calling them. I received my MTN bill which I paid, even though my contract is incomplete. I am paying for something which I am not receiving. I didnot even get my free 30GB data with my upgrade. I called the retentions dept and spoke to Dumi, I asked her to cancel my contract cos I am now very annoyed. She asked me to contact the store which I did and I am told Rose is off. Today is the 1st of March and I have gotten nowhere with MTN. I actually upgraded over the phone for convenience sake but I have been totally inconvenienced from the beginning.