DSTV Poor Service

On 17 May 2025 I placed an order with MultiChoice telephonically. I upgraded my decoder and also a new dish. After various calls to the call centre an appointment was scheduled for 9 June 2025 for the technician to come and install the new decoder and dish for 09h00. At 11h00 he had still not arrived and when I phoned he rep****, "He will come, just wait." I also have a work and cannot wait forever for someone to arrive when a set time has been arranged. I then phoned the call centre and complained, whereafter the attendant rep****: "Just be patient he will come." I made various , almost daily, calls to the call centre to arrange for another technician and even asked to speak to a manager / supervisor to complain. I was just informed that the manager / supervisor will contact me. Two and a months down the line I have still not received my upgraded decoder and dish, but DSTV never fails to take the debit order strictly on time!!! How do I go about to lodge a complaint against DSTV for this pathetic service.