Runwal Group — Runwal Forest Charging extra Amount during Possession,

We Purchase Flat On Dec 2018 in Runwal Forest. Flat No : 2501 Tower Pine. whatever the amount set on cost shee in 2018t, now they are asking more than 2 lacs at the time of possession. While purchasing flat the sales manager promised about amount mention in cost sheet will be the final amount at the time of purchasing. there will be no extra money will charge but Now the new relation Manager send extra amount which is more than 2 lacs. This is really disappointing.