I am a single person living in a 1 bedroom unit, I...

I am a single person living in a 1 bedroom unit, I generally keep off all of my lights and powerpoints to save money on bills and the only thing consistently running through the week is the fridge. Neighbouring units bills are $50 for the billing period or $80 at the most whereas mine is $200? Is anyone else having these same issues with Synergy and how can it be resolved because as a single person working and supporting myself I cannot afford for this to continue. When I contacted synergy and explained my neighbours bills are lower they said maybe I have a faulty appliance and not to compare bills with neighbours as my neighbour may be entitled to a rebate which I know she is not. Can anyone help?