Account cancellation and credit

Telkom have taken over 5 months to correct a mistake that they have made and still have not resolved the issue. My mum requested for her telkom line to be cancelled as of end of May 2018. The line was eventually cancelled a few months later however there was a big bill attached to it for all the months that the line was not even been in use as they even moved from the premises and the line stopped working a fee days after request to be cancelled. Clearely the service was stopped however the billing still continued ( she was only liable for the one month from the date of request,to be cancelled. From then , we have just been going around in circles, logging multiple disputes , been passed from one team to another and 6 months later, she is still receiving a monthly bill for a service that was requested to be cancelled on the 31st ay 2018. Latest dispute reference, ( ********** 7, ********** 2, ********** 9) . Why is this simple issue taking so long to resolve ? All I need is the account to be credited , send the updated bill of what we owe ( which will be one months bill from the 31st May until the end of june 2018 and thats that, issue resolved. Does it really take months to resolve something so simple? When its time for the monthly bill to be sent , that is sent on time evertime but when a consumer needs assistance , we get the run around not for days , or weeks , but MONTHS!!!!! I have all emails to and from telkom, all messages, sms etc yet no one has contact us telephonically to assist, we have had to call in all the time, speak to different call centre agents, explain each time from the beginning of time and get no wer at the end. Telkom, I have many accounts with your company as I run a business, the least you can do is resolve this issue to still give me some hope is keeping my business with you. A very disappointing service received .