HUGE FRUSTRATION!! Worst possible service EVER!!

I would like to know, how many times do you need to call Vodacom to cancel a contract??? They have changed the service, so that you cannot do the cancellation in store, you have to phone in for all cancellations, but when you do call, HOW MANY TIMES - they have NO record of that, and want me to give ANOTHER 30 days notice!! You speak to a different consultant every time, and they have NO record of any previous communication?! This is NOT acceptable. They are so quick to call you when there's money outstanding on a contract, but when you need to have a contract cancelled, or ANYTHING to be done on your contract - the IGNORE any and ALL requests!! Tell me - what are we, as the public supposed to do, when you're hands are tied behind your back? There's nothing you can do, because of *********** consultants, that you sit on the phone with, for hours, and STILL nothing gets done?? They pass the buck every time, because every little issue, needs to be transferred to another department - REALLY??!! HOW CAN I CANCEL A CONTRACT, AND KNOW THAT IT'S DONE???!!! I have given notice, 60 days, 30 days, and followed up 14 days prior to the date of cancellation as well, and still it hasn't been done!!!