Tata Motors — 6 month Delay in delivery of Nexon XMA

I booked one TATA Nexon XMA Petrol Daytona Grey (Originally booked XE petrol but later changed the variant) on 24th Sept, 2021 from Tata Motors Cars Showroom - Shivam Automotive, TP Nagar, Korba, Chhattisgarh. The dealership promised to deliver the vehicle before 90 days. But as on 26th Mar, 2022, even after passing of six months, I have not yet received the delivery of the vehicle. Whenever I call the dealership about the car, they always reply that they have placed the order but it has not yet been billed.