Rain appalling frustrating poor service

I bought a rain Sim card and had a problem connecting to the internet. I had requested uncapped at R250 pm. After numerous calls chats and emails I eventually received internet for a few days. Long story short I received a bill at the end of August I received a bill for R01140.00 and they said the app was filled in incorrect. I paid the bill a week later and was connected again with no internet access. Once again numerous calls emails and chats to rain still no joy. They suspected a Sim card error but refused to change the Sim card. Every agent told me the same thing take the Sim out reset the router try this try that and still no internet. Two weeks later I'm told that I don't have internet coverage in my area and that they are using a bounce signal in my area. They asked me did I check if I have coverage before I signed up which I had no knowledge of. After all the frustration and very annoyed I canceled the Sim and told the team leader Ornic that I refuse to pay the September bill as I did not have internet for the month and I am very annoyed and disappointed. He assured me that he will contact the billing department and sort it out. I went to the bank to stop the payment and was told in the bank that nothing appears as rain it reflects as a point of sale which is a purchase. Lo and behold rain takes the money from my account and i asked for a refund all I am told is the manager or someone will call me back. No one calls back. I have waisted more money on calls and emails to rain with no joy. Please advise me what to do now as I want my money back. Thank you God bless.