Mahindra And Mahindra — Bolero neo N8

Dear, Sir/Madam
I have purchased a new Mahindra Bolero Neo .Same day I noticed a unusual sound from rear side from the vehicle, that time i was only one person inside the vehicle. After that when we seated 5 persons the sound was very awful like some thing broken from rear. It was very disappointed me. Then i called to the sales executive he said take to service center. In the service center they can't found the problem .I had to left the vehicle there. They said very soon solve the problem.