New Conlog IP54 prepaid meter using triple the units of my old meter

We hat to call the city out to have a look at our pre paid electric meter as the electrician said we had a hot wire connection. They intern said they had to change the meter on the spot and when i ask how this will affect us they said it wont at all. they then installed a new Conlog IP54 meter which is now using more than triple the units we used to use. When calling the call center they said no it cant be true and i must get a private company to come check my appliances or play the council to come out and check again.