Telkom contract cancellation

Opened LTE account 2 years ago and it worked well until we moved to an area that had bad signal. I cancelled the contract in November 2017 after trying many times to resolve the issue. To date they have NOT cancelled the contract and I have been forced to pay the account monthly due to the fact my phone is also on the debit order. I have been in the shop many times and phoned even more times and they have still not helped me. How difficult is it to send an email with the contract closure costs to me? This has tarnished my previously good experience with Telkom and I am beyond frustrated!