Two month wait for phone to be delivered

I have had an absolutely shocking experience with MTN/DSV. MTN phoned me two months ago to inform me I was ready for an upgrade on three phones. I spent an hour on the line with them and they said DSV would phone me to confirm delivery. Nothing happened! A week or so afterwards someone from MTN phoned to tell me I was ready for an upgrade! I informed them that I had already spent an hour with MTN giving them my detail. Nothing had been recorded and I had to repeat everything! This basically happened a third time about a week later! Have a look at your telephone records! DSV then contacted my wife and they had the entire wrong address. They said they were ready to deliver in Centurion Pretoria. I reside in CT! She gave them my details. I then after much follow up received a single phone! I phoned them daily and explained and after much "backwards and forwards" and after telling DSV many times that they needed my right telephone number and providing it every time I ultimately got a delivery! sadly just one more phone! I then followed up for the 3rd phone and this issue has gone on for over two weeks. I phone DSV, the promise delivery, I give them my correct telephone number and nothing happens. On Friday 15 December the DSV person promised to address. I phoned this morning to be informed by DSV that the order had been cancelled and the phone returned to MTN! I have phoned MTN and again tried to sort the problem out. Chris on ********** has promised me he will sort it out. The problem is that everyone I have addressed the issue with over the last period has also promised. What more can I do! This is just no way to treat a customer. Its simply unacceptable.