No action on upgrade request

I did a pre-registration for the samsung s7 edge on the 3rd of march and received an automated response reference ***0. This would allow me to qualify for the samsung vr.<br> Over a week after this I heard nothing back and called mtn who informed me that the person responsible for this will call me back. A week later I still had nothing and I called again. I was sent up and down and finally got a call from a gentlemen who told me they could not get hold of me. I asked for the proof of this as I had no missed calls, messages or emails. He was going to get this. A week or two later again I heard nothing and then escalated to various people. One of these people was Eddie Moyce who had somebody call me back the same day. This person assured me they are looking into it and I will get a call back the same day. Another week or so has passed and nobody has come back to me. This is frustrating, disappointing and bad service. I now insist that MTN do my upgrade to the s7 edge ASAP and give me a VR from their side at their cost to apologise for this.