Photograph your meters, send them into your energy company, ask them to check the meter is configured correctly. Check the MPAN, that is the number above your barcode on the meter, is the same one that appears on your bill.
This will show you that it is your meter you are being charged for.
Were you there last year? What was the usage (not the cost), what is the usage for the same period this year, what's changed.
Make sure they have not set a debt on the meter, though it should show when you toggle the buttons on it. Turn everything off in the house, I mean everything, is the meter moving? Plug back in the fridge/freezer, how much are they using?
Before you use another appliance, check the reading, check it after.
Something is chewing up the electricity or there is a mistake, you need to try to figure out which. Call the energy company too, to ask for financial assistance if you can't afford to top up the meter. See if they can offer anything