The world's worst billing system. Hugely overly complicated bills that make no sense and are just muddled with estimates and actuals. One bill said an engineer took the reading one month which isn't true as I never let an engineer in to take the readings. EDF continue to confuse my monthly actuals with estimates and over charging me. So many wasted paper bills with contradicting billing information from one month to the next. Trying the get me to switch to a smart meter. Why can't they just accept my monthly actuals and stop with the meaningless, unhelpful estimates. I have taken this to the ombudsman but very early stages. Avoid EDF if you can as their billing system is beyond useless and stressful.