Incorrect Billing and mal administration

Hi, I have been having unresolved account and meter related issues with Eskom and their incompetence to resolve is beyond me. i have provided evidence to them that they swopped meters with my neighbour and billing me for his consumption. he has his friends come over from Eskom and bridge the power meters costing me 13000. The credit was subsequently done and now i am waiting for my refund which has been months already now Eskom deducts money for bills even after converting my home from conventional electricity to prepaid. My tenant is the house is losing electricity units and we fear that the neighbour has bridged this service now. from 13000 i am left with around 7000, why? Can someone competent from Eskom please address my issues and return my money with interest.