Promoters are harassing me

Hi, I have had cell c promoters calling me non stop for stupid deals because I have a cell c contract. Make them stop. I recently took out one of the deals 'never to be repeated' only to find out the next month a much better deal is available. I am now stuck in a contract paying 199 per month for 3G of data where people who went directly through cell c are getting 20 G of data for EXACTLY the same product. This is unacceptable. The lady from the call center was unfriendly and unhelpful and sounded like she had better things to do. You are a call center operator you deal with grumpy people learn to deal with it! I want to cancel and return this product due to the sheer blatant disgust I feel about this situation only to be told that I only have 7 days in which to return it. I'm very unhappy about this! I have been with cell c for years I tell my friends how good they are. I was even trying to gt my fiance to change but after this and the frustration of the call center ect I will tell people its absolutely not worth it. Cell c are cleverly ******** people every month through promoters that 'don't work for cell c, they just promote our products' BS if you ask me. Take my number off!!