Do u have the confirmation booking letter with u? Just kick their A**es then thats your right, i mean investing 7.55 lacks wud have had given u alot more then giving the money to IMC for such a period.
PS: i thot ecomatic was readily avalible. theres a posibility the showroom jerks sold ur car for premium and awaiting a new one for u.
The best idea is to email the customer services at IMC.