contract cancellation

I phoned in to cancel my contract a month in advance with vodacom and i am getting billed for an entire month due to the fact that the month ended on the 4th.<br> <br> i got told it is done as per contract terms and that is why it is being done this way.<br> if vodacom is truely a provider that runs by the contract then they can explain to me as to why my account was increased even though i signed a contract at a different amount.<br> <br> this is utter nonsense and ******* of the service provider, this is the only time that vodacom has given me a care call because they want to try and convince me not to cancel my contract yet i have been with them for more then 10 years, no loyalty rewarded from them as long as they getting paid.