Refund Request Failure

I am SO dissatisfied with Vodacom's service, they are absolutely terrible and I would not recommend them to anyone. I have been with Vodacom for almost 20 years and have now lost complete trust in them. I took out a new contract in December as my old contract was due to expire in January and I did not want that number anymore and thus wanted it cancelled. I struggled for months to get the contract cancelled and phoned in several times. I phoned in January and they promised to cancel the contract but the contract was never cancelled. I phoned in on 6 February, 24 February and 26 February only to be told each time that the cancellation was never escalated. I phoned again on 3 March and was told the cancellation was escalated and that I would receive a refund for February's debit order that went off. I was told that someone would contact me to arrange the refund. No one contacted me and I phoned again on 17 March. The consultant confirmed that my contract will be cancelled on 31 March and that someone will contact me to arrange the refund. No one contacted me and I phoned again on 23 March. I was told that the refund request was never escalated but was reassured that they have escalated it and that someone will contact me to arrange the refund. No one contacted me so I phoned again on 29 March. I was told that the month that I wanted the refund for was never specified but they reassured me that they have escalated it. I was assured that my bank account would not be debited at the end of March as the contract has been cancelled but low and behold...THEY DEBITED MY ACCOUNT on 31 March!!!!!!!! Now they owe me refunds for February AND March but it does not seem like anything will happen. I am so irritated and disappointed as I keep wasting my time to phone in but nothing gets done. I am tired of this. PATHETIC!!!