Hyundai Motor India — Price increases after booking

I had booked a creta ex petrol on 4th Aug 2020 for which delivery was promised on 20th Aug 2020. After booking, they told me that the requested variant is not manufactured by the company as of now and they wont be able to deliver it on time. I said, ok. No problem. Please arrange the vehicle asap. They didn't inform me about the resume of manufacturing and that I got to know from another dealership. Now, today when I reached there and asked to deliver my vehicle, they told me that the cost of vehicle has been increased by Rs. 90000 (approx-on road) and I had to ask for refund. I had been asking them for getting my vehicle on the basis of old quote but they didn't agree. Dealership details: AKC hyundai, Shahjahanpur (U.P.).