Royal Enfield — No proper clarity

I booked a classic 350 dark stealth black bullet on 9 0ct 2021 and tentative date was 8 Dec 2021 i got a call from the showroom manger Mr. Tushar Mehta today on 14 Dec 2021 saying the bike has come but at the time of booking the down payment apart from 10000 was said to me 39000/- at the time of delivery to be paid and i had booked this during a scheme which was pay down payment of 15000/- but today when i received the call they asked me to pay 53000/- or else don't pay, on asking why have you increased they said the scheme is no more applicable for me on todays date
how is this possible, i booked on a particular scheme i should get on that scheme, the staff is so rude when asked about it
why is the scheme not applicable for me
the showroom that i booked was in himmayat nagar in hyderabad .