British Gas are the least worse gas supply
their little scam (official) Hi Karen McClntock! is to say your are late and there's a surcharge( £10 or £20)
which they add on..... when you arent late ! ho ho ho what a good joke.
THEN
whilst you are whining about whether it is £490 or £500 - you are marked as a late payer on your credit score
THEN
you get a letter with honeyed words, how they work their socks off for a splendido service and they are so so sorry for screwing your credit rating but there is nothing they can do. It is all done in the best parsible taste. Thieves and crooks