duplicate meter readings on Account Number *** and Account Number *** for the period 31-03-2023 to 04-07-2023 on Premise ID *** and Meter Number 931755

Eskom duplicated the meter readings between the previous owner's account and our account when the move in/move out was done. Now I am sitting with an enormous bill that was actually already paid for the usage on the previous owner's bill. Numerous e-mails send to no prevail. No Eskom branches available close to Port Edward (Shelly Beach branch closed December 2022 which was already 40km's from my house). What do I need to do to get feedback from Eskom and assistance to sort out the error they made?