Despicable Service

On the 10th of May 2018, we escalated to Telkom having to pay for 2 landlines with them. We received a form to complete, which we did and an acknowledgement thereof was received. On the 29th of May, we followed up on this complaint, but did not receive any response. It’s now going on 2 years and still no feedback received from Telkom. How will this be resolved? How will we be reimbursed for all the additional charges?