Cell C Service

I have been a Cell C customer for several years now. I have been paying thousands of rands for my contracts. 3 Months ago I changed banks and i called them to inform them. I was told that the system would update the information within a month and they would start debiting me from my new acc. Month end comes and I noticed that they didn't take their debit order and my contracts got deactivated. I called in again and i was then told that whom ever helped me previously did not log a case for my details to be changed. I then asked the lady well I cannot wait another 30days for you to change my details is there not some dort of arrangement we can make cause I need to use my lines and she said that a manager would call me back, This was 3 months ago and I am still waiting. I kept on calling a few times and it's still not resolved. Yesterday I was called asking me why my contracts are 3 months in arrears. I simply responded that I am more than happy to give them my details again so they can proceed with taking their money but I am not paying for the benefits(Data,Airtime etc) that I didn't use in this 3 months because of their ****ty service. I was told once again a manager would call me back. I am still waiting. You can think by now that I am disgusted with the service and the waiting etc ect so I decided to try and call them, which I did. 1st call i got through the consultant to me that she will transfer me through to her supervisor Patricia, I was on the line 17mins then got put through to their ****ty survey. I called back again, same thing different people I was on my way to be transferred through to a manager when I got transferred to a survey again. Do not ever waste your money like this paying for such service.