contract cancellation against CPA and pure unfair!

i have been with me and you mobile for about 5 months , endorsed it with all, whilst on a call today - i received a sms telling me that my contract will be cancelled on the 11th- all because i never used 50mb of data for the month,. i made this my primary cell number , all friends family and work now have it as well, and now it's just cancelled, no decency of a heads-up nothing , forced now to migrate to one of the bundled packages which is not what I purchased. common business courtesy would have been to advise me in month 1 already that my data usage was low - i have wifi and work and home so would have been so, had i had known or been advised about i would have taken steps to increase my usage. the practice of cancelling without warning and obligating choice is sinister ! which self deserving / respecting company behaves like this ?, as if the R300 contract was a catch to ***** me away from my other provider just to ***** me over later on a plan i never wanted , which will place me in worse off position. i even obliged to pay in any penalties but none will be heard, i guess like everything in life- you pay peanuts, you get ******s - reporting to icasa!