If I could give 0 stars, I would, because they deserve it. I switched to a different tariff with them, they sent me a confirmation email but never changed it on their system. But when I showed them I was being charged the new tariff on my smart meter, they NEVER acknowledged the problem at all! This company is absolutely corrupt and made of greedy incompetent people, who have no clue of what they are doing. They made me waste my time and made me become mentally tired by contacting them over phone and email. They don’t know how to work as a team, don’t communicate between them and all they care about is making copy / paste of their very “polite” template emails and only acknowledge what they want, whenever they want, NEVER what you want or when you need it. Incompetence, careless, useless. I am paying £75 exit fee and NEVER recommending or using them again. If you want peace of mind, STAY AWAY from British Gas!