Hyundai Motor India — Delayed in fixing problem for 1 month

My job is totally dependent on car . I have regular use of car. But from few days I am facing problem related to engine . So yesterday I visited the vantage Hyundai showroom, Hajipur Bihar. They told me to leave the car for 1 months for repairing purpose. I don't know why they are taking lots of time . I asked them to provide me other car because my job is totally dependent on car but they make excuse that the other car is not available . I bought the Hyundai car as it is among one of the reputed automobile companies one but after seing this. I can't wait for 1 month. I want the problem to be fixed as early as possible . Or I want separate vehicle so that I can do the job till the problem is not fixed.
Regards
Kumar Saurav
Vehicle no-BR31AE4613
Mobile-[protected]