I am Not a happy customer

i experienced super bad service with tshwane municipality, thy have been sending bills every month and I have been paying, suddenly i was told that the were estimating the meter readings, apparently i owe them 4500 and thy cut off my electricity.. Its not my fault that thy estimatedy usage, and still i dont believe i used that much electricity. I paid 3800 and thy promised to come and reopen. Since Friday I've been waiting for reconnection. Called the call center numerous times and evry consultant has thier own turn around time. I am really fed up.