Extremely frustrated loyal customer

I am very disappointed in Vodacom. I requested an upgraded on a contract which was due instead a different number was upgraded which was not even due for upgrades. I requested a call back before confirming the upgrade and no one called me back. They still sent the device on the incorrect upgrade extending by contract to 2 extra years to expire in 2027. I have queried this and was promised that the courier will collect the device. No one collected after which I queried again and still no one collected. I even asked for a reference and was told there was no reference. I am now told that my issue has never been logged. I have been a loyal client since forever. I will now be canceling 2 other contracts which is due for upgrade just because of this terrible service and huge mess up. I am now unable to make calls from my main number. Extremely frustrating.