Spark energy have to be the worst energy supplier you could ever wish to have. However, If you’re looking to have your direct debit jump from £28 to £148 a month with no communication to alert you of this change - go with them. If you want three separate promises of £119 back into your account as a result of the increased direct debit but would like to wait two and a half months to receive this money - go with them. If you want a sarcastic and contumelious phone call to ask you why you’re switching supplier and then to be told that you’re prudent for taking a rate at almost half that of Spark’s - go with them. If you’re looking for the highest energy rates and the lowest level of customer service, then I urge you to look no further - they are the company for you.