My Salarpuria Sattva possession shocker in Sanath Nagar

Possession for our Salarpuria Sattva flat in Sanath Nagar was in March, and honestly, the final bill was a shocker. They hit us with these 'club membership fees' and a 'corpus fund' that weren't clearly itemized upfront, adding almost 2 lakhs extra. Plus, the electricity meter installation charge was way higher than expected. It felt like so many hidden charges just popped up at possession, making the actual all-in cost much more than planned. Did anyone else face this with Salarpuria Sattva or other builders in Hyderabad? What did you do to challenge it or get clarity?