Issue with a clock spring

My car is Kia Cadenza 2010 model

I took my car into a garage for changing the
light hand switcher which is located near the
wheel steering. The mechanic put the steering
wheel to the center then he took off the wheel
and he took off the clock spring, after he
finished his work he returned back the clock
spring and he returned everything back in its
place again and I went home and everything
was fine.
I drove the car 3 different times in a different
days after the mechanic repair, but in the third
time when I was driving my car suddenly I
turned the wheel full to the right and when I
want to turned back again I broke the airbag
wire inside the clock spring and the airbag
light showed up on the panel.

Note : this broken clock spring I bought it new
from one year ago and I used it only for
40,000 km of driving.

My question is, is this a mistake from the
mechanic or not? And should he buy me an
new clock spring?
Because some people said that if it is the
mechanic mistake the clock spring would
broke up from the first time of driving not in
the third time of driving.
So I need your answer please as soon as
possible.