Telkom are less than useless

We have been trying to get R 2500.00 rand from Telkom for over a month now. Our landline was cancelled on 1 June 2018 after a lengthy effort on out behalf. We received bills ever since 1 June 2018 - it is August 2019. We have sent in excess of 30 emails over the year asking for finality - often mailbox full from them. We get the odd text that the case is resolved but NOTHING happens.