Contract upgrades botched

I currently have two contracts with telkom. Both expired in February 2020..so i decided to upgrade both my contracts : Upgrade 1: this contract was upgraded to receive a new modem and sim on 3 April 2020. They 1st captured the incorrect address and my package had to be returned. To date i have no idea as to when i can expect delivery

Contract 2: this contract was upgraded but onto the wrong sim. Trying to have this rectified has been useless.

So basically after the botched upgrades im going to be paying for 3 contracts when all i wanted was for 2 contracts to be upgraded in addition to not receiving my new device.

The competence has been frustrating as simple upgrades cannot be carried out and we bear the brunt as customers. This is unfair and it seems like the call centre agents are complicit in having customers incorrectly billed.

We are giving business to telkom but they fail to honour their side of deals.

What do we do as customers