Noida property, builder ne chuna laga diya, what to do?

Been dealing with Supertech Emerald Court mess for years now. I work in real estate but buying for myself is different, yaar. Super area vs carpet area games, they all play it. But the real kicker is the EDC and IDC charges at possession. They quoted one thing during booking, now it's like 2 lakh extra! Told me 'govt. rates badh gaye'. Is this even legal? Anyone else faced this? I'm thinking of going to consumer court. Is it worth the hassle? Also, after possession maintenance charges itna jyada hai. Is it just Supertech or everyone is same? What did you guys do?