Unacceptable EVERYTHING - Customer care and store

I took out two contracts with Cell C for data sim cards. Each was R99 for 2 gigs. I have a debit order with them and was very concerned when I noticed R558 being debited instead of R197. On 26 Feb 2015 I emailed customer care and got an automated response. On 27 Feb 2015, Portia phoned me from customer care, she couldn't help me,I asked if I could please be transferred to their accounts department, she hung up on me! On 2 March 2015, I went into the Cell C store in Fourways mall, just to be told that I am paying for the extra data which I am using. No where do I even go close to using those 2 gigs! I had to stand there and try and explain this to a young gentleman with no name badge and an obvious hang over. I was then told that my contract had expired and was now paying normal rates-no one from cell c phoned to tell me that it was expiring and then they looked on the system and apparently someone had phoned the data sim card. They obviously got no response and just went ahead and did their own thing and renewed my contract without my permission!! HOW DO YOU PHONE AN IPAD?? I then wanted to cancel these contracts and I get told to phone another number as they cant do it in store!