Samsung — Refrigerator not working and the paper sticker with barcode on the compressor is missing.

I had purchased a Samsung Refrigerator on 29/09/2015. Refrigerator has stopped working and I had put a complaint for the same. The technician visited my place and according to him the compressor is not working.
And I cannot claim for a warranty for this because I do not have the barcode sticker behind my refrigerator. I do have the invoice of the Refrigerator.

Since last 6 years the Refrigerator is cleaned regularly due to dust issues.
And the sticker might have been faded or removed.

I fail to understand how this voids my warranty and how should I be penalised for the same. If this sticker was so critical then it should have been embossed or some better pasting mechanism should have been used by Samsung.

Note I do have the original bill of the same. Currently I am facing lots of issued as the Refrigerator is not working.

I would appreciate if Samsung India looks into the matter and give a solution for the same and help me claim the warranty.

Details of the Refrigerator..
Model code - FFRS21HSTW
Samsung Ref FF RS21HSTWA
Chasis No - W68554AF700016

Also I have read my such issues and have seen prompt response from Samsung India team. Would appreciate if I also get the same response.

Thanks in advance for your support.