Incorrectly billed and horrible services

I was billed on the 1st October for the amount due for the month of September. I received a statement invoiceafterwards acknowledging the payment and informing me what was due for the October which was R1550 which was suppose to be billed on the 1st November. I called the call center on 20th October I had an enquiry only to be informed by the recorded agent that my account is in arrears but no one could assist me on that day because the system was down. I forgot to call back with regards to this because I was convinced that the recorded agent was mistaken. I received the shock of my life when R2000 was debited on my account on the 29th October. I called the call center only for the agent to tell me that the previous month's payment didn't go through which I didn't understand because it didn't bounce in my account. She said I should send my proof. I decided to go to the bank the next day and verify with my bank that the payment went through and I then sent my bank statement to the agents email address. On 30th October they debited my account again R1100. After I didn't hear anything from the agent I called again and only to be assisted by different agent I had to explain again and send proof again. Still no-one has gotten back to me to say the they have logged a case on my behalf as promised. I sent follow up emails to both of agents and still no response. I tried to call the call center I waited to speak with an agent for more than 40 minutes and then the call cuts afterwards. I am really frustrated with telkom's bad services all I want is my money back