Telkom the pits

I have been trying to cancel my late husbands contract since 12/07/2021 to no avail. I have emailed them three times in this period. All I get is a reference number but no further communication. I initially went into a store but was advised that this could only be done via email to *** The debit orders however continue to come off his account. I have also contacted the callcentre and i was told to send my request via email. I have gotten no joy to date I suppose Telkom will now be worried as this months debit order will not go through as the account is now closed. Tired of their service.