Money gone / Data gone

I am coming to the end of my 24 month contract. I was on the epic 100, where i used to get 100MB plus 100 sms each month. I also have a capped amount which i use for my calls and this usually lasts until around the 24th of each month. This month I have been ill in bed since the 1 July, which means i used my homes wifi for the data and made around 3 / 4 calls. Today, the 5th of July i get an sms stating that i have reached my limit. This is absurd!!! I called the contact centre and asked for a detailed explanation on my account usuage. The agent asked me 100 security questions which i answered all successfully. She then went on to argue with me that i receive a 100 free minutes and 100 sms....i told her that i have never received 100 free minutes but 100MB. I then asked to speak to her team leader....she hung up the call. This call was made today 11h40 with my MSD ********** 582. I suggest you send that agent on training again. I also want an explanation as to what happend to my data and my money! I've been a Cell C customer for more than 20 years... i will find another provider if you start *****ing from me!!