Unable to cancel my contract

I took out what was meant to be 24 month contract with Telkom but it has been 27 going on 28 months! I have called numerous times at the call centre, I have been to the branches but to no help. What I have been told by the call centre agents is that they have backlogs and they don't know when they will get to my contract. Keeping in mind that I sent the form that was required in 2015! When I ask to speak to the manager, I am told I can't. How atrocious! I have been paying on average R860 for the last 3 months yet no one has the capabilities to cancel this contract! All I want is for this contract to be cancelled and no one is able to do that! Is this the service Telkom provides to their clients? Surely this should be deemed ********* coz I am debited for a service that long expired and that I no longer want. It's as though you delaying the process so you keep debiting us.<br> I am appalled by this!