Telkom is ruining my life

I ordered a phone via Telkom, I already have an account there. Was helped by a lady called Nokuthula Mfekan if I am not mistaken, she is in the sales department. Confirmed address and all. This was in June. The phone was not delivered to me. When the phone was not delivered I then contact her to notify her of this. She says she will assist. She did not assist. I never received the order. I then receive an invoice with the order. Without the order. I contact her again. No help. She then sends an email to confirm that the order was returned because of BAD ADDRESS. I still contact her please cancel the order and I will make another order as she is no help. To this day I had not received any help. I don’t know how many cases I have opened with Telkom. Now they have send me an invoice of R11 400 for a cancelled order of something that has never reached me. That I was not assisted with and every call center agent I have spoken to is not willing to help me.