Impact Meter Services - double bill with no investigation during COVID

My bill received in August 2020 has doubled in consumption and doubled in rand value. We understand the tariffs has increased but this should not translate into a 100% increase. I've sent an email to investigate on 11 August and to date I have not received any feedback and its almost time to pay. I did not budget for a double bill especially not in this financially strained time that we are in.

I'm almost sure that if I pay what I normally pay (and budget for) I will get a disconnection notice however my plea to investigate has gone unanswered.