Telkom REFUSES to cancel my ADSL line since May 2017 & no one can resolve

We have continued to cancel this line from May 2017, and everytime we are promised that it is cancelled BUT still are being charged. This line/account was CANCELLED MAY 2017. When you call the call center they promise to correct the error but nothing happens - Telkom just keeps billing every month, even though the service is not used. When you go online to MYTELKOM - you cannot get create a complaint as it just says sent for processing BUT no reference no. is ever provided. If you go into a Telkom branch they say that they cannot help you - you must call in - not that they even try to assist. Just going round and round. This is so ********* and dishonest. No customer service at all. Telkom must apologise and Reverse all charges & cancel/close account URGENT!!!