I have been chasing them for bills for almost 18 months. I cannot count how many times I have either used the live chat or called them (over 20) and am always told that 'someone will get back to me by a certain date' and 95% of the time it never happens and I have to chase again. They also mixed up my gas and electric readings and ended up giving me a bill that was 4 times too high. I've moved companies now and am still chasing the final bill, being told again that they will get back within 48 hours. I've tried being really patient. I had to go through the Energy Ombudsman to get anything done at all.