Hero Motocorp — rannjeet motors service center thane mechanics don't know their work

I had given my hero pleasure for servicing 1st day for the self start problem. They changed the switch of self start and gave it to me. But still it didn't start. Then they changed the battery and then it started but it was not working at times and the vehicle was stopping all of sudden during run. Then i went back and told them the problem but they didn't resolve the problem and gave it back to me and when i checked the vehicle it was not starting at all as i told you that it was having that problem at times only... Like once every 20 times. And then after i gave it to servicing now it is not starting at all. Then they said the self start motor is dead coz of the overall wiring. But i suspect that the kid mechanic there did this shortcircuit to the motor coz i looked at his face and i saw that he was frightened and was sweating. The service center did this mistake with our property and now we have to pay for it?
This is how your service center people are? Uneducated and randomly picked mechanics?