Eskom is a nightmare

In June 2021, Eskom double billed us without sending us a statement. To told us we used R7000 worth of electricity but they cannot show us a statement. We then got disconnected and had to pay to be reconnected. In July, we paid twice with an estimate to accommodate our June utilization. After they disconnected us for the outstanding amount, we paid again to cover for June, but our statement does not reflect all the other amounts we have paid and now we are in arrears.

Who can we escalate these guys to because they are literally de*****ing us. They do not want to send us statements to prove their claims and cannot locate our payments even with the proof of payments we sent to them.