Season 3 is Final?

First of all I must say that my perspective of Australia and Aussies is based merely on watching series and movies, so I`m fully aware that it`s not realistic! Therefore, I loved Winner and Losers very much, and I`m shocked that 3rd season is the last!? Is there a chance for season 4? In the final episode there were so many cliffhangers that the series can easily be continued!