Hyundai Motor India — regarding misplacement of h-band

Sir, i own a creata (Sxo) which was been purchased 6 months back. I was been informed about the misplacement of the h-band of my car. As soon as i was been informed about it i sent the product back to the showroom but now its been 4-5 months and i haven't got my cars h-band. I keep going to the showroom every 3-4 days once but the authorities don't respond properly they keep making excuses. Kindly make a note of it and take action.