BPTP's extra charges are a proper rip-off.

Just got possession of my BPTP flat in Sector 40 last month. Honestly, the hidden charges after booking are insane. Nobody told me about the extra ₹2.5L for IFMS, power backup, and other random fees. Is this common with Gurugram builders? How do you guys manage these surprise costs? Feeling quite cheated, tbh.