Extremely Bad Service

I have done an upgrade via MTN. They have arranged to deliver the device via DSv Mounties. I have 2 contract number and MTN gave the one that my wife uses as contact. DSV contacted me on that number and because it is my wife they of course do not want to talk to her but me. So I have phoned them and arranged to call me on the number at a time that my wife is with me. The first time 2nd December they said they will phone at 4. They did not bother. They phoned my wife again on the 3rd so I phoned them again when my wife was home and they said they will phone in 15 minutes. They never bothered. We are running in circles here and they are not keeping to their promises. It looks like this is never going to happen and they seem to be just plodding along without really caring about getting the job done. Very bad service. It is really not difficult to keep to these arrangement but I guess it is not important enough for them.