Inaccurate information by call centre, interruption of service, unfair billing

I took an uncapped LTE package at the beginning of October 2018. I received the router on the 2nd October 2018. My monthly subscription is R899, however because my October subscription was pro-rated it was added to my November Invoice due on 30 Nov 2018. This made my invoice R1773 in total for October and November 2018. In the first week of November, my service was suspended. The call centre agent on the same day sent me my invoice, showing that I was not in arrears and advised that the matter would be escalated to the back office to reactivate my line. This was not done, I contacted Telkom the next day, Thursday 8 Nov 2018 as well. I was told on the Friday 9 Nov 2018 that there is a R1500 credit limit on my account and that my account is automatically suspended when the invoice exceeds this amount for whatever reason. I had not been advised of this or how it works at any point before. I immediately made an EFT payment to bring my not yet due invoice to below R1500. I was told by two separate call centre agents that I could send in proof of payment to expedite reactivation of my line. I was given email addresses to which I was told to send the POP. When I received no response, I called in again to be told that sending proof of payment would not expedite the reactivation of my line, the payment would need to reflect. As a result I had five days with no internet but I have already been invoiced for the full subscription for the month of November 2018.