Billed for estimated instead of actual reading

The last time my electricity bill was correct was in October 2014. The situation is such that I used to have 3 meters one of which was not connected to anything and therefore never moved. This was reflected in the Invoice of October. Since then I have been billed for haphazard estimated readings on a meter not connected to anything. All 3 meters were taken out on January 29th, against my wishes and without me having requested it, and replaced by a smart meter. The technician took pictures of the meters and assured me that the correct readings would be forwarded to the accounts department and the faulty billing be corrected. But in the March invoice I am once again being billed for estimated 4,548.124 kWh which I have never consumed.<br> When I approached city power on 25th February 2015 in a desperate plea to correct the false account, an employee ordered the installation of a smart polyphase meter - in spite of me having clearly stated that such a meter had already been installed!<br> I don't know where to go from here as I have not been assisted and cannot believe the attitude of city power's employees who seem to not care at all about the consistent false accounts they send out.