ATS Sector 150 quality is a real shocker

Just moved into my ATS flat in Sector 150 last month after possession in March. Honestly, the finishing quality is already showing issues – small plaster cracks, some seepage in the balcony. It's frustrating after paying ₹1.2 Cr for a 3BHK. Getting customer support to even acknowledge these problems is a whole task; they just don't pick up the phone sometimes. Things nobody told me before buying, you know? And the post-possession maintenance charges feel really high, like they're making up for lost time. Are other builders like Godrej or Gaursons better with their construction quality and after-sales service in Noida Extension or Sector 137? Am I the only one who feels this way about the initial quality after handover?