Whatever you do don’t sign up to Together Energy. Customer service is abysmal. I’ve been with them for two years but only because they hadn’t billed me since July 2018 and I seemed unable to get them to do anything despite saying I had a credit of £913 at that time.
Had to go to the Ombudsman to get any action but I have finally now found a contact who appears able to respond and I have managed to get a bill dated for 1 April 2019, still had a credit of over £500 but also managed to get it refunded. I am now due for renewal and am going to change whatever the quote I get from another supplier. Bit concerned that they still haven’t got billing up to date despite providing meter readings and probably still in credit. I hope that changing suppliers won’t jeopodise a final refund.