I can't believe they did this. we rented our house out for about 16 months - electricity bill was paid by the tenants. tenants moved out in december. we sold the house in April. so for dec-april the electricity bill was paid by us (house was unoccupied). the other day we get a bill for £850. eight hundered and fifty fecking quid
. "based on meter readings." and the bill actually said "Because this bill was larger than normal we have checked that it is correct and it is".
so I rang. they said they would look into it. It turns out, as I suspected, that the shortfall between money collected and electricity used was down to the tenants. nothing to do with us. In actual fact we're in credit - so the company owes us money - and is sending us a cheque for £80.
Although, to their credit, they dealt with it quickly, AIBU to expect them not to make such a huge mistake in the first place, and, in particular not to explicitly claim that it has been checked and is correct.