I recently received a full refund from National Warranty Company for the dud policy I was sold. I used a template letter from demandarefund.com.au, sent it to Presidian (the company that owns NWC) and within two weeks had a refund.

I couldn't believe it, as I (unitnetionally) bought policy back in 2013. The page is run by a group of lawyers from the Consumer Action group, who were available to follow up on my behalf if need be. Hit them up if you've EVER taken out a dud warranty!

Approximate cost: $1600