All-my-rewards deceptive and misleading

I opted for the Cell C all-my-rewards program through the *128# prompt which stated that if I recharged with R40 within the stipulated time frame I can choose one of 3 rewards so I chose the R120 free airtime reward. I then proceeded to load the qualifying recharge amount but even after so doing I never received the R120 airtime reward. I contacted Cell C customer care on 135 where I spoke to an *********** Zama and explained my query to her. She then told me that it is not a guarantee that I will receive the reward because it is a win or lose situation so I asked her why am I being misled then because no where in the t's and c's does it make any mention of such? She started behaving very rudely with me and kept speaking over and above my voice as I was speaking with her. I told her that we can sing together but not speak together and she needs to let me have my say. I told her I would like an answer to my question on why am I being misled as a customer and she kept on repeating the same answer back to me each time saying "as I said it's a win or lose situation" as if to say I'm an idiot!!! She was either incapable of trying to understand my point of view or perfectly capable and understanding but just blatantly ********, arrogant and abrupt!!! I asked to speak to her manager seeing as she was totally unhelpful and after putting me on hold for some time she got back to me and told me that she was putting me through to her team leader named Senzo and that I should continue holding on the line for this person. My patience was running thin and my tolerance running low so I ended the call. That being said my question still remains...no where in your t's and c's does it mention that the rewards program in question is a win or lose kinda situation - why... Why am I as a customer being misled and deceived by you into recharging my airtime balance with a specified amount with the promise of being rewarded with either data, minutes or airtime after doing so only to be told by you afterward that the reward is not guaranteed but a win or lose kinda situation?? This is not only misleading but false advertising and completely unacceptable!!!