Shocking customer support from Multichoice

I received an email from Multichoice to lock in my DSTV contract for 24 months at a reduced rate. When clicking on the provided link it does not take you to a page where you can set this up. I have called them on a number of occasions and eventually spoke to a consultant who told me that he will change my contract and send me a SMS confirmation with all the new details. This has never been done so I don't know if it has been changed or not. I receive calls from them daily to try and sell me a new decoder and when I tell them to sort out my account first I am told they cannot access it.