Where are you?
In Victoria, there is an Energy and Water Ombudsman Victoriahttp://www.ewov.com.au/
and all the Ombudsmen in this area are state-based. On the Victorian site, if you click on 'Useful Links" [extreme right of screen], then on 'Ombudsman and dispute resolution', it has links to the Energy ombudsmen in the other states.
But before you go to any ombudsman, you need to know several things, like whether you have the right meter, wired correctly, to collect the data to enable you to get a feed-in tariff.
You also need to be on a Feed-in Tariff from your retailer (the bods who send you your bill). Just because you have had panels installed, doesn't mean you automatically get a FiT - you need to have the meter changed, and a new contract with your retailer.
The change in NSW from net to gross FiT announced by the NSW state gov't just before Christmas has apparently thrown a large spanner in the works in NSW, as meters which had been installed for PV panels right uip to the announcement were wired etc for a NETT FiT, and they are either the wriong sort, or wired incorrectly to get data for a GROSS FiT. Of course, the gov't didn't bother to consult with the industry before making the announcement, and the whole thing is a b&&&s-up. The indostry has rightloy complained that they were not given sufficient notice to change meters over, and they do not have either the time or the man-power to get the job done by yesterday. (NB This is one of a VERY few cases where yelping and complaints from the energy distributors etc is, in fact, justified!) I believe that as a result, the date for implementation has been reset to 30 June, or 1 July, or thereabouts.
If we know where you are located, then someone can give you a more authoritative reply, as all the tariff and electricity supply stuff is State-based.
If you are referring to rebates for the installation of PV panels, then that is a different matter, and it IS a federal matter. The Dept of the Environment, Water, Heritage & the Arts [DEWHA} website rebates page is a good place to start. http://www.environment.gov.au/rebates/index.html