Raheja Developers — revanta project

Raheja builder,
Is corrupt and strealing people money how can we allowed him to launch new projects when he hasn’t delivered projects he started 7 years back? How can government allows these builders to make millions of money in profit and not taking care of public interest?
I have a flat in revanta and as per agreement he not honouring any agreement
And not refunding any money?
What can common man do in this country where we leave big builders with power and money do what ever they like