Sattva Lake Ridge possession delays messing up plans?

Did a site visit to Sattva Lake Ridge last month and really liked the 3BHK layout. But the sales team keeps pushing the possession date. First it was Q4 this year, now they're saying mid-next year. My kids' school admission depends on us moving in by June, so this uncertainty is really stressing my wife out. Anyone else dealing with these kinds of possession delays with Sattva? What did you do? Should I be worried about more hidden charges or further delays down the line?