Telkom just making up amounts and suspending my internet!!!!

I have a 12 month Fibre Home contract. The price is R385 per month. Somehow, last month,my Invoice came to R1345..needless to say, as I Debichecked R385, the debit order did not go off. Boom, internet suspended. I pay..oh, can't do it on app, cause they are doing away with app. Eft, wait 48 hours to reconnect. This was last week. The try take that same amount, R1345 off via debit order on 31 Aug. Again. I wait to see what my new invoice says, so I can eft, before they suspend. Nope. Boom! Acc suspended yestersay, 3 September. No new invoice. I pay a random amount, R600...still no internet. How did we go from R385 to R1345??? How do they JUST suspend yesterday, without informing me? I still await my latest invoice. I work from home, and need the nternet