Panasonic — led tv shows a crack on display when switched on

Address:

Dhanbad, Jharkhand, 828122

Bought a panasonic led tv 40 inches last year october.
Earlier this weak suddenly in the morning when we switched on the tv there was a crack coming up at the bottom of the screen but there was no physical damage done to the screen externally as there is no mark on the screen.
We lodged a complain with our dhanbad panasonic centre and a technician came for a visit he said this is an exterior damage done to the tv which is not covered in the warranty agreement but as we are repeatedly saying no external damage was done by us as there is no mark on the screen and nor was it hit.
I would like you to look into this issue with utmost priority and let us know how panasonic can help us here in after sales service because this is really unacceptable because the technician is proving me a liar any help here would be really appreciated.

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