Samsung — Microwave Oven

I had raised a complaint about my Microwave Oven and got the technician appointed by Samsung on WhatsApp chat of Samsung chat session. ON visiting the technician gave a list of items which were required to be bought. He informed me that he will be back with the parts within one week for replacement. He gave me receipt about the payment and details of parts. I had paid him 1000 advance and since then he has not reverted back. I called him many times for the concern and he denied saying that the parts are not available. Please look into this issue as it has been over a month and the response is very disappointing.
Date of Technician Visit - 7/07/2021

Mobile number of the technician - [protected](Brijesh)

Please update me on yadhuvanshirukshat.[protected]@gmail.com. and get this issue fixed as soon as possible