Cell-C joins the ****bags. ***** like the rest of them.

On 9 March I posted a "great" vote for Cell-C cancelling my LTE contract in one phone call. Now, 6 July I regret doing that as I can see Cell-C are just the same bunch of ***** as every other mobile network. The promised cancellation never happened. They are still billing me. I even had 2 phone calls last week wanting me to upgrade. Can you believe there does not seem to be a single mobile operator with any integrity that one can trust. ****bags, the whole lot of them. So how do I get this cancelled?