Cell C - Bad Service from Call Centre

I'm emigrating in the month of September and want to cancel my LTE data package at the end of September. I have now spent the whole morning trying to get hold of the cancellations department. I'm being cut off continuously or promised a callback that just doesn't happen. I can't but think this is a sales strategy, if I wanted an upgrade this would of been resolved within minutes. However when it comes to cancellations frustrate the customer till he or she merely gives up on attempting to cancel. I can't believe a system can by designed in such a myopic function, unless there is an anterior motive as mentioned above, so much for corporate ethics..