TERRIBLE SERVICE FROM VODACOM

I cannot describe in words how helpless and angry I am at this point. Vodacom is probably the worst business I have ever had to deal with. I have made several attempts via telephone calls and emails to try and sort out my account. This account was due for an upgrade but after this ordeal I will NEVER do business with Vodacom again. In September of 2017 I changed my banking details via the call centre and confirmed it via email attaching all the necessary documents. In January 2018 I again sent the email and call it in as it was still not done. In the meantime my bank charged me fees for the debit order returns. I have been trying to rectify this issue for almost 1 year now. Vodacom then took it upon themselves to charge me a further Debit order fee of R100.88 per month for the debit order returns. Every day I call and every day the same answer ... "We will escalate your dispute". Nothing is being done to this and in the meantime I cannot cancel my contract and have to keep paying it every month.