Up until this moment in time I have been satisfied with service provided by this company but at present not happy. Hands up initially I am totally to blame received an e mail from then advising new tariff for loyalty clients which I thought great and advised for change. Immediately charged 150.00 as this meant I was in default of an existing contract. Hands up being in my eighties takes me all of the time to remember what I had to eat yesterday never mind penalties. After several responses from them advised as my account had plenty of credit on it shouldn’t be a problem for me this winter. First time I’ve been penalised for being frugal with energy. I wonder how many other elderly people have been taken in. Why send e mails out to existing contracts without advertising pitfalls of change. I will learn from this mistake