Debiting money without the customers consent

I initially requested Telkom to change my contract to a top-up their *********** then decided to suspend my account and I couldn't make or receive calls for more than two weeks. When I called to query this I was told that they are trying to fix this and now that my account is suspended I am now owing them R5000. I called the Telkom shop in WhiteRiver in Nelspruit and I was assured that the normal amount will be debited from my account. On the 25th of September they debited R5609 without my consent. I wouldn't advise anyone to take a contract with Telkom they are ****** of note.