Hyundai Motor India — Eon era+ purchase

Address:

Pune, Maharashtra, 411016

I have purchased Eon Era+ from Sanjay Hyundai but while selling they told me that the car is manufactured in Dec 2016 but actually while taking delivery I come to know that it is manufactured in Feb 2016. It was 100% betrayal with me so I have not taken delivery. Also the showroom completed rto formalities without telling me any chassis no.etc. Please let me know the formalities to be completed before going ahead. I will file complaint with customer grievances tomorrow. Kindly let me know process to be followed.