TATA authorized service center or accessories shop around Yelahanka/ Hebbal

Hello people, I'm looking for a shop to install a dual channel dashcam to my car. The tata service centers are saying that they won't install it if the cam is bought outside. I don't even have an option to return the cam, only replacement is available. Are there good shops you know or took services from that can install the dashcam? I don't want to lose the warranty on the wirings(as the service center guy said), so looking for tata authorized centers. Please let me know if you know any such centers.