Unhappy customer

I recently did a few upgrades as I have a few accounts with mtn and have been a customer for many years. I received a call a week ago to say my upgrades were successful and dsv would be delivering my devices in a day or 2. Time went on I made arrangements to remain home to be present for when the deliver. The following Monday I receive a call from mtn to ask how my devices were and if the agent could complete my last upgrade. I advised I never received anything, she then checked some system and advised there was a delay with dsv not advising what the delay was. I then tried to call back but couldn't reach anyone as you outsource your sale and lines are restricted from inbound calls. I call the normal mtn calls centre to be told they cannot help me. I call dsv that advised the delay is my contact number. The number mtn provided them with they've been trying to contact me before delivering I no longer use. According to their processes mtn needs to update my details with them before they can dispatch. So now I'm a stuck customer can't get through to mtn to correct the matter but also why did the consultant not check why the delay to correct the matter. So I'm sitting here and waiting for whenever mtn decides to call me back. Oh wow!!!!