Force Motors — Ambulance booked on pre gst price not dispatched yet and the dealer is asking post gst price

Address:

801505

Hello sir
I had booked an ambulance with force saktee utility automobiles pvt. Ltd. Based in patna. The address for the showroom is shaguna more, danapur khagaul road, patna.
I booked the ambulance via receipt 191, dated 15/06/2017 and paid the sum of rs 10000 for the same.
The booking date is of pre gst and therefore i agree to book the ambulance and settled myself with force motors

Now my ambulance has not been dispatched and the dealer is asking the new revised price for the ambulance.

I request your goodself to kindly solve the matter to the earliest.

Thank you

Anand kumar tiwari
Bihar