Having accidentally over run the 12 month contract I discovered that my account had built up overcollections of +£550 ( my error although they have never emailed/texted me about bills, meter reads etc let alone the end of the deal ). Promised to refund it within 2 days. A week later no money and not even a record of the phone call so had to start all over again ( phone wait is 25 mins or more so have plenty of things to do whilst they deal with other problems ). This time the refund was going to take 5 days?? Did receive 5 small random refunds for less than they owed me!! They then collected the ddm again despite knowing it was way too high...nevertheless that didn't stop the little devils cancelling my switch to a new provider because they are apparently bouncing lots of switches "by mistake" If you like to waste hours on the phone ( last phone call just now took 60 mins to answer ) and this level of customer service I cannot think of a better/worse energy supplier to deal with - in which case good luck!!!