No customer service or support - false advertising - DSTV internet

I have been a DSTV premium client for decades. Two weeks ago I opted to purchase their 400G internet offering and cancelled my fibre subscription through an alternate provider. The first issue was that they furnished the courier company with my postal address so the router delivery was problematic. Our data was used up within three days because apparently a 20g package was allocated. I have called the call centre about seven times. I received a customer satisfaction survey and gave the lowest rating - clearly no one reads this or is concerned with the feedback as I’ve received no contact. Supposedly the issue was being escalated- today I found out it wasn’t actually. In between the line was disconnected as there was an outstanding amount due - I was not informed that, despite being a debit order customer I would have to pay in to avoid disconnection. My line is active again and apparently I have 18GB left. No one can tell me what I have actually been allocated but it definitely isn’t 400gb. So I’m left in the same scenario where I will be left without data, and have to pay in extra. I should never have taken up this product. I’m considering canceling all of my DSTV services.