Poor service

Tshwane billed me on a incorrect conventional meter since April 2021 and I requested them to change the meter to prepaid as the bill kept on escalating. I lodged a complaint to Tshwane via customer service and they refer the matter to metering, metering told me there is nothing they can do as the meter is replaced with prepaid meanwhile I told them that I want meter to be tested and I will pay for the testing. I send emails to dispute mayor's office with no feed back to date.