Builder customer support post-booking is where the real problems start, I feel.

I'm finally taking the plunge, fed up of renting yaar, landlord raised rent again! EMI vs rent math is pushing me to buy. Looking at Prestige City and Keya Life By The Lake. Prestige ka naam toh bada hai, but Keya Homes ka customer support after booking kaisa hai? Do they even pick up the phone? Yaar, after booking documents ya queries ke liye they just ghost? Which builder handles disputes better after booking, from your experience? Need opinions on their responsiveness, please batao!