Telkom Credit department are useless and don't read their emails!!

Hi

My account was closed in November 2017 and was billed for a further 8 months before billing finally stopped invoicing me. Took most of 2018 logging multiple disputes with the billing department to finally ensure my account was cleared and reflected nothing owing.

Its been a month since the billing department emailed the credit department to clear my name on Transunion. Still havent heard anything from the credit department after another email was sent to them by the billing department.

Who do we have to speak to, to ge anything done.