Telkom are ******* and ***********!

I cancelled my wifi contract with Telkom in October 2017. Sent through the cancellation forms via email to ********** and gave them 1 month notice. I have since been debited for November, December and am only too certain for January as well. No body answers their call center line either. I got hold of an agent on their website, who said that they haven't received my cancellation letter, yet they rep**** to it saying they had. I am honestly tied to of and the usual no feedback