Rto India — tempo traveller hitting my car and not accepting his fault

Sir,
This happened yesterday (14-feb-2020) at whitefield, bangalore right in front of broadcom office which is near big bazaar signal at around 4.30pm.
I left from my office which is near vydehi hospital for home. Near broadcom office there was traffic as 4 lanes were merging to 2 lanes.
I had seen that the tempo traveller bearing number ka 41b 8853 was little behind so i was joining his lane as there was lot of space between his vehicle and the vehicle ahead of him. I almost joined the lane when he starting honking horn and crashed my vehicle from back left side which gave a good scratch on my door removing color.
We stopped at side and tempo traveller driver started arguing that i did not see and came inbetween.
When i said it was not my fault, he threatened to beat me. I became scared so i told him i am leaving.
I would request you to kindly take action against that driver.
Attaching picture of tempo traveller.
I could be contacted through email at [protected]@yahoo.co.in