I have an account with ORG44 who advised me by email about a possible better tariff available from the same company I was already with.  I have used this service  successfully before. I had a little difficulty completing the form finding the meter reference numbers etc.,  so I called the helpline and spoke to a lovely gentleman called Mark Moore.  He walked and talked me through the whole process and I changed my tariff with ORG198 and saved ¬£387 a year and because I was still with the same company did not have to pay the ¬£70 exit fee.  I cannot recommend the service or ORG44 too highly.  The  most  worthwhile hours work I‚Äôve spent for a long time.