Horrific customer service

I upgraded my phone to an iphone 6 on a MTN mychoice 100 package. I was told by the sales consultant that I would receive the phone within 2 - 10 days. After continuous following up, I received my iphone 3 months later. During this time I was told that the BIS service would be restored to my blackberry free of charge as the iphone was not available as initially promised. This was not done and I have been charged for BIS for the 3 months. I was then only credited with the minutes in terms of the new contract. It took 2 months before I received the free sms's and data as per my contract. Once the iphone was delivered, the sim card that was delivered was the incorrect sim for the iphone. I was then told I either need to go into a branch to collect the correct sim, otherwise it will take another week for the sim to be delivered. I then went into the Sandton branch and swopped the sim. I also handed in my RICA documents and was told the sim will be active within 2 - 24 hours. 24 hours later the sim was not active. I then phoned the call centre and was told the RICA process had not yet begin and this will take a further 2 - 24 hours. I now await with no phone and nothing ever gets done.