Review METER INSTALLATION AND BAD ATTITUDE OF STAFF

My meter was installed September 02, 2019 by One Engr Afeez with this contact number ********, so rude and uncultured. Till today my meter didn't work and has kept my house in darkness while there is light everywhere. Called their office line +******** times without number and have been tossing around from one staff to another. During which of their staff with this phone number ******** was asking me for N10,000 before he can come to rectify it. On top of paid N72,000 plus for meter that never work for one day. All of them have stopped picking the calls. Is this a way of milking people or scamming?
So frustrating that till today September 07, still yet to be rectified.