Toyota — part replaced with another car

Address:

Ludhiana, Punjab, 141012

I sent my car to glob toyota ludhiana by pick up service for replacement o[censored]nder engine plastic sheet.
After all the work done i had noticed that there is sound like wiseling under the hood when i push the accelerator. Then i had checked my car from another dealer radiant toyota they said the sound is coming from tensioner and its belt. But there is no sound before i sent the car for denting painting then how it is possible that the tensioner was damage immediately after coming out from service center. I doubt there was some changing in car parts inside or outside the service center because the km meter also driven more then the actual distance from my home to service center.