Rain is the worst!

I got a rain package in July as I needed the internet to work from home. From the get go the connection was bad. I called them many times but I would be on hold for 15minutes until my airtime would run out. Finally I got through after a few days. They told me what I needed to do, I did. It was so slow but working but better than nothing. Within a week or two it stopped working again. At this point I was genuinely disappointed and angry I switched their router off and got another router from MTN which works perfectly. Come month end they debited my account. Alright no problem with that as I had used their service for a week. Since I had not used it the following month I didn’t expect that they would want to debit my account the next following month again! They did. I called them and I enquired like what is going on, why take money from my account when am not using your router anymore? The lady tried to explain but I never understood. As I am writing this I have an outstanding balance of R1996.00, don’t know how I got to that!! And I stopped putting money on the account that I used to get the rain service because they have tried to take the money several times! I tried to call them many times. When I call billing it never goes through but when I call sales they are so quick to answer and they say that they cannot help they can only transfer me to billing, and then again I will be on the line forever and never go through! Their customer service is bad. Really disappointed at this point.