MTN are taking R260 from my bank account each month without my agreeing to it and they do not respond to my complaints

MTN must be the MOST un-responsive company in AFRICA with no concept of good corporate governance what so ever. I am being charged R260 a month for 2GB of recurring data that I DID NOT agree to and I have phoned their 135 number and held on for ages to speak to a consultant at least THREE times. The 135 number is USELESS and a total waste of my time, as is emailing customer care and complaints. The 135 number opens the query and closes it before any service has been offered. Customer care clearly DO NOT care and Complaints? I have no idea why that Dept. exists. I have emailed several times and got email reference responses from: Ebbedene and the following reference numbers: ***, ***, ***. I even emailed *** as suggested from a USELESS, UNHELPFUL, NON-EFFECTIVE 135 phone call. Other than the above I have had no response to the monthly SKIMMING from my bank account of R260 EACH month!