Borosil — Repair person didn't return my product

I ordered my borosil chopper from amazon.
It stopped working an month ago.
So i contacted the borosil company to fix the problem.
They told they will send an repair person to my home who will fix the product as it was in the warranty period.
A guy named CHETAN came to my house and took the product with him and told me he will fix it and return it to me in a week.
He asked me to watsapp me the bill of the chopper.
His contact details is [protected]
Date of incident : 25 july 2020
He didn't return my product ever since. And now he stopped answering my calls and the borosil company itself are excuses when i talk to customer care.

I want my product back.
Please respond to my regards as soon as possible.