Unstoppable harassment calls

<p>I have been with Cell C for many years. I have upgraded my device several times. However this time I am quite happy with my Samsung S5 phone and decided to save some money by not upgrading. A few months ago I visited the V&A branch to enquire what my options and actions should be. I was informed by the shop assistant that I should do nothing. When my contract comes to an end I would automatically go onto a R50 per month contract that would let me topup airtime and data as I needed. That sounded simple enough. However that is when my nightmare started. I get 4 to 5 calls a week from Cell C to inform me that I am legible for an upgrade. I have explained my situation several times, I have lost my temper severall times. I have threatended to close all accounts with Cell C. Any yet they do not stop calling me. Am I now subjected to this kind of harrasment at work for the next two years or to the time that I am bul**** into upgrading? I think not! Get your system in order and stop calling me or I will simply go to Vodacom!!!</p>