Hyundai Motor India — I dont get proper information on purchasing a car

Address:

MDH HUNDAI, 516360

I have purchased a car in hyundai car in produttur while jan 17, but bs 6 they told car is available from april, so u can buy a car of 2020 model coming bs 4 so i haved trusted abnd purchased a car and after when i purchased next day only bs 6 car has came and they have cheaten me about not saying that product now what i want to do, how can i solve that issue, and i have wasted my money, and when asked to manager is saying company i=has not given prop[er information about what i want to do they are telling