Always in credit with SSE then Ovo take over. Issued bills I paid them then, 3 months later all previous bills were AMENDED ( original bill erased from my account) and so of course in their favour ,I had more to pay. Calls to customer service were sometimes ok but at its worst had a man shouting at me saying"its all your own fault you must give a meter reading on the 4th of the month" Saying it 4 times over, My mistake was to give the reading on the 2nd ! I feel I have paid under duress to them as I had email and letter threatening Debt collectors for £29.00 .Never had this before so extremely worried for Knock on the door. 6 months of elec only is already more than I paid SSE in a year .No peace of mind for this so called 'Priority customer'. If Bills were left original surely more transparent to all ,each time what I owed was quoted and I paid it only for more being asked on the next bill. When I called and asked where is this extra amount from to what Kavan told me ,I owed come from, the lady said" I dont know where he got his original figures from." Stress, Stress Stress for this Priority customer ,affecting health .