Telkom is the worst

For over a year now, Telkom has caused me so much frustration. It started with a damaged line (10 Oct 2017) and pole and escalated into no service (beginning Jan 2018) , me trying to cancel the non-existent service for 7 months and now a fight to try and get a refund for services not rendered (the invoice says it was due 1 Oct!). I have phoned multiple times, I have submitted paperwork that nobody initially told me I had to submit. I have complained on social media. Everybody in my office knows about the struggle. What more can I do to just end of this chapter of my life? I will never again do business with Telkom. All I want is this refund to be paid out!