DSTV - Disgusting and Terrible Customer Service

I have a huge problem with DStv (Multichoice) and no one has bothered to assist me. I am on the 24 months "Price Lock" and my subscription amount is "fixed" for 24 months. I subscribed to ShowMax which is supposed to be a "Free service" on the package I have which is the full package. I did not realise, that I had subscribed with both email to ShowMax and I got charged for this on my account. I only discovered this after I called ShowMax directly. I have unsubscribed both my emails to ShowMax yet I am still being charged on my account for ShowMax. I called DSTV yesterday to lodge a complaint and they lady I spoke to assured me she would get back to me, which of course she didn't! I find the not one person, even after I traveled to DSTV Head Office on Sunday, could assist me. I find that I am spending so much money on this service yet they customer service does not exist! I certainly am entertaining cancelling DTSV all together!