Yes proceed legally, they don't have proper escalation policy. I tried complaining to LG CEO office email but it only got redirected to the same LG support guys i was dealing with.Thanks for providing the contact number. I am getting very irritated talking to these people over phone. As of now, I am trying to get proof in written so trying to get their responses in email.
I also think official shop is over hyping. When I visited them last week, they told me that if I had purchased from them, they would have challenged LG and got a replacement within this time.