Exclusive: A NSW woman has revealed how her father unknowingly racked up a nearly $6400 debt from years of unpaid energy bills.

Naomi Thompson, 34, has spent nearly five years helping her ill father slowly bring down the debt – and the balance is a stark reminder of how vulnerable Australians are among the most impacted by the rising costs.

Thompson's father, who suffered a stroke, didn't realise he was being contacted by Energy Australia until the bills ballooned to an unmanageable amount.

READ MORE: Professor flooded with death threats over what he wants banned from Queensland

Do you have a story? Contact reporter April Glover at Sign up here to receive our daily newsletters and breaking news alerts, sent straight to your inbox.