Telkom is unable to resolve line cancellations, they do not have such an operating procedure!

After cancelling my parents Telkom account in March 2018, (my parents lived in this house for 48 years and had a Telkom land line for every year, and they have never been in arrears, they needed to move to a retirement village), Telkom still has not, 9 months after the fact, sorted out the cancellation, the cancellation of the debit order, and has not refunded us for 3 month's worth of wrong debit orders that they continued to deduct on our cheque account after cancellation. Nine months afterwards, they still keep on deducting a monthly maximum debit order from my elderly parents' cheque account (which we then need to reverse at the bank's branch), and send messages of blacklisting, legal fees etc. due to an "overdue account". I have logged various calls, and disputes, the calls has been escalated at least five times, and every time there is a promise of "someone" that will call and resolve the issue. Although the call centre agrees with the cancellation and the refund due to us upon reviewing the documentation, no one can resolve it. Really pathetic.