I WANT MY MONEY BACK 😡

I hate Telkom with everything I have, I wish that company could burn down. I have a Telkom contract and supposedly to end last month. They wanted me to upgrade I refused due their poor service so now they tried so in December they were supposed to debit on the 20th and they which I have a proof there’s money in my account hence I get paid on the 20th, then they decided to debit on 31st of December. In January I went to Telkom and they told me I owe December and showed the consulate a proof that they did debit on the 31st and she said it bounced back and showed her my bank statement that there was money in my account. She said I must log a complaint and I called the customer service a very useless one and they said I am owing again. So on the 20th I Decided to pay for December and January in the morning and later that day they debited. I called them I spoke to Siphelele who gave me his email to send and I did till today no response. I called again yesterday and I spoke to Williak7 and he asked me to send proof again and I asked him to hold for since I needed to gather all information that is needed and he was too impatient and closed my line. So now they need to refund me my R3400 and they telling me that they won’t be able to do so since I used their data and minutes. My question is why am I supposed to pay for all that in extra while my account with them is up to date and don’t want to even refund me my money. I hate Telkom don’t fall for their and have contact with them cause when it’s time for your contract to be completed they try so hard to find something for to pay them