Sorry to hear all that, but did you refuse admission to your property? They have a legal right to look at the meters.
@ScarPower1 Sorry to hear all that. You need to be clear what the problem is. When you speak to customer services tell them exactly how you disagree. Of course your disability is important, but it does not explain what you want SP to change. Electricity is very expensive for heating and £1000 a year is not unusual these days. Good Luck.
@ScarPower1 Can your children help you to manage your electricity? £2000 a year is very expensive if you have gas for heating. Try to avoid using electricity for any hot water or room heating. From what you have said I think you must be using electricity for heating, you should always use gas heating because it is so much cheaper.
Sadly 2022 will give us all double our normal fuel bills, so if you feel you can't manage maybe it's time to sell the house and downsize to a small rented property, your children can advise you. Good Luck.