Tata Motors — Rattling noise from rear pillar of the cars

My Tata Nexon car MH12TN3433 is having noise issue from rear pillar .. Rudra motor wagholi pune is unable to fix the issue as they further need help from Tata motor engineers ….. I have checked with Rudra motor they are saying that they have sent multiple emails and call to Tata motor team in Pune office Pune l but still no line up is done as of now today... I have sent multiple emails and raised complain with them but no result... MY car is still in service center and not getting any help from Tata motor...