Billing discrepancy and terrible service

To whom it may concern,

I have been trying to sort out a discrepancy with my bill from Telkom since May 2018. I have called them, emailed, tweeted, Dm'd and to this day no one has helped me. Telkom are now threatening to with debt collectors, whereas the fault is on their side and no one is fixing it. Every consultant I have spoken to, whenever I ask them legitimate questions they either mumble something to me, cut me off or put me through to the next person... I called Telkom on Monday, 1 April 2019, of this week and they promised to get back to me within 72 hours... it is now Saturday 6 April 2019... Could someone please assist me with this query!?