Telkom mobile misleads and robs again

Since i have taken up a contract with telkom mobile, without fail, i am left frustrated every single month with all hidden costs that results in telkom *****ing my money for no proper guidance or reasoning. I was schocked again when i recieved an sms that states my account will be debited with over R700 (limit is R500) am being charged for a service i have cancelled and not even used and my monthly installment should have been around +-R150, so where does R700 comes up? I want to cancel my account, but found that it is more difficult dealing with a call centre agent does not want to assist or refuse to put me through to an higher authority. This happened last month too and stil waiting for that person to contact me. This is now leading me to take the matter up with consumer protection. Enough is enough. Stop Robbing us Telkom.