I moved into a new build block of flats in August 2018. Since then I have been unsuccessful taking over the gas account because I have been informed that the MPRN has the wrong post code. E.On installed the meter and have been really unhelpful sending me to national grid who told me to go to Domestic M, who gave me contact details for Xoserve. EDF who manage my electric account just keep telling that Xoserve details are still not updated. Would appreciate advice on what to do to get this sorted