Petition against cda

How can we as members of zameen and many other pakistani both inside and outside the country file a petition to curb corruption/incompetence in cda? And undermine all the politicians and elites using it for their personal use while depriving the country of the only well planned and once scenic city.
One would have dreamt of the whole islamabad to be like bahria town but the way things are planned it might become rawalpindi 2
What are the avenues one can take these petitions to those responsible for taking action against the mafia?