Nexa — wrong detail in rc book

Address:

600056

I had taken delivery of my car baleno delta petrol on 29th oct 2017 from nexa katttupakkam - chennai. After a month i received the rc book. But instead of petrol it is mentioned as diesel. I had given it back for correction and a week later i was information that my rc is ready.
When i saw that, it was a shock for me as they have scratched the printed word (Where diesel was mentioned) with blade and have handwritten as petrol over that. A round seal had been affixed without any signature from the rto officials.
I have handed over the rc back to them and insisted for a new rc. But still date there is no response from them. I am visiting the nexa showroom regularly for the rc book, but each and every time some silly reason is given and still i am waiting for the rc.

Regards
Prabhu s
Vehicle reg no - tn 12 v 5501