We've been in our house since March and set up dd's for £40 pcm for Gas and Electricity. Obviously with it then being spring/summer we went well into credit for Gas (CH was off) which they now want to pay us back (not even sure their calculation is right as they missed taking some intially and then took 3 months together).
Why is is so hard for them to realise that the reason we are in credit is that we are budgeting for the winter (obviously not yet knowing how much our usage will go up). If we accept it back now we'll only owe it again next time ! Can see how people can get into difficulties paying bills if they happily go along with this, as is tempting.