I have two meters

Can anyone help please. I have two meters, one of which I think is smart and a standard one. I am switching to bulb on 22nd July. The smart meter seems to work ok, but I can’t get an actual read off it, only what its using daily and weekly. The other meter, the standard one is crazy. Its telling me I’m using 340 units per week. I never use that much over a quarter or half year. The only things running are the fridge, the freezer, tv and combi boiler for hot water (obviously heating is off). Any ideas or suggestions, I’m frantic as I don’t know which reading to send initially to bulb

Thanks in anticipation