Impossible to cancel contracts

<p>I took out a 2.5gig 24 month data contract with telkom. I sent cancellation through on the 14th of December for this contract, that is currently still active and im still being billed. </p> <p> </p> <p>I have emailed numerous people & departments. Wasted hours of my life trying to resolve this with no success. </p> <p> </p> <p>I am unable to stop payment as my cell phone is also linked to the same account. </p> <p> </p> <p>The ONLY thing that Telkom does timeously is cut a persons service once a block is put on payments!!! </p>