Santa and Banta Singh were bitter enemies

Santa and Banta Singh were bitter enemies.
Santa lived on the 1st and
Banta on the 7th floor of the same building.
One day the lift was out of order
and Banta Singh decided to play a trick
on Santa and called him for dinner to his house at 7:30 pm.

So Santa huffing and puffing manages to reach the 7th floor.
To his dismay he finds a big lock on the door and a message -
'HA HA ULLU BANA DIA!'

Santa is angry but thinks a lot
and finally writes his reply below Banta's message
- 'MAIN TO YAHAN AAYA HI NAHIN THA!!'