Booked tata car in dec 2024 with discount, now dealer wants me to pay more for 2025 model - what should I do?

I booked a tata car altroz in December 2024. That time the ongoing discounts were 45k plus dealer gave me 17k discounts from their side. They said the car will be delivered in a month. But now the dealer called and said that 2024 model car is not available and the will deliver 2025 model. But the ex showroom price has gone up by 15000. And the discounts are reduced from 45k to 10k. I can understand that the ex showroom price has gone up due to recent price hikes. But I booked in December so the discount should remain the same right. The dealer is saying becouse it's 2025 model the discount is reduced. I called up the customer care and they were not able to provide a solution on the same. They also said the same thing. Now the difference is around 50k after new quotation. I will be taking insurance from outside. What should I do? Should I go with the price hike or the dealer should agree to the December discounts. This has made me rethink the whole situation. Also if you can recommend any cars in the 11L budget. I have attached both the quotations from dealer.