Skoda India — Engine manufacturing defect. Skoda refusing to take the responsibility

Address:

400067

My vehicle SKODA Superb no. MH 01 AV 4659 is given for repair on 22.10.2016 at JMD Kandivali. Till today, no clue as to what the fault is, ? how can there be such fault ?when will the car be repaired?
I am verbally informed by JMD that there is some engine problem but they are unable to find fault.
I have lodged a complaint with you also on 2.11.2016 but no resolution as yet.
They have no answers as to what the problem is.
NO analysis or diagnosis report is given for the test conducted. All they are telling us is We will have to replace the engine and pay 7.5 lacs for it.
They aren't even ready to acknowledge the fact that their engine has failed.
We are clueless with regards to our further options. Request group members if they can suggest a proper course of action that can be undertaken.
Thank you