MTN is a **** - Useless Call centers

It has been a few days now, trying to get ahold of MTN and cancel my contract. They signed me on something I did not agree to, as the amount has changed, along with the cooling off period.

The call center keeps hanging up on me, or transferring me to non-existent number.

Now I have to pay a cancelation fee which I should not, but even the amounts keeps changing.