If a company is having a promotion where you can instantly win a prize, and the prize they try give you is not the prize you have won who do you contact?
Is there some national group that watches competitions? or is it ACCC? Or is there a better suggestion?
It would probably state in the T & C of the competition. I believe you have to have a licence for each state you are running the competition in, so whoever gives out the licences would probably be the group. Is this a hypothetical question or is there a particular comp that you have an issue with?