I was a customer of Aitricity.My meter was not read for a while. When I decided to switch to different supplier I had build up a credit of over €1000 as the estimates were to high. I did not get a refund for my money for over 10 month sending letters and calling customer service which were totally useless. Eventually I got my money back after getting the regulator involved! I would be very careful about this company! Business customer in Galway.