TELKOM HAS THE WORST SERVICE!!!!

I called Telkom customer service last year to cancel my contract and convert the number into prepaid i was advised to fill in a cancellation form and email it to cancellations department, which i did and i sent the form on the 10 November 2017 i didn't get response. I then called on the 12 January i spoke to Simphiwe Mathaba who gave me his email address to resend the cancellation form which i did. still i received Data on the sim card i called and i was given this email address ********** still my contract is not cancelled till this day. I have had enough with telkom and i will not be paying anymore because i requested cancellation on time and now Telkom is giving me a run around instead of canceling the contract.. i want it cancelled immediately.