Internet Costs

Their customer care line failed to explain how it is possible that I could have used up 41MB and R10.97 airtime within less than a minute and then after I purchase 25MB for R6, switch on my mobile data, and before I use it I get 2 smses, one saying I have less than 15MB and another saying my bundles are depleted. I have been using Cell C for many, I know how their internet billing works, and now for them to rob me in broad daylight is just insulting and unprofessional, especially when they cannot even explain or give back my airtime. They should give back what they took from me. Who just decides to press 'clear' on people's accounts like, these system don't function, there are people responsible for billing, why would you choose to do nonsense now and then feel like it is ok for you to say 'No we did nothing, it was you' ?? I have been loyal to this network for nothing. I am switching to a better one.