My electricity meter was upgraded to a smart meter after a solar panel installation. Consequently my off peak meter and general electricity meters were removed by the meter installer. Today I received my electricity bill which showed an off peak usage of a 30 KwH. I had not been using off peak electricity since I am using gas water heating about 5 years ago. My previous electricity bills can prove the disconnection.
My suggestion would be the meter installer should ask the occupant of the building to certify the meter reading before taking the meter away to avoid dispute.
I would like to see a space on the the web site for user to launch a complaint.