Whirlpool India — Overpriced Calstrait and Warranty Claim

I have purchased washing machine through Flipkart on 14/Nov/2022. And the installation by whirlpool has arrived on 16/Nov/2022. The problem here is along with the installation the service guys are forcing us to purchase some extra products like in my case with Whilrpool washing machine, the service guy advice me to take Scalegon product for cleaning the washing machine. I said a big No for that. Still he convinced me and made me to buy. But again he asked me to take calstrait water energizer which he told we should use it for washing machine for changing the water to soft otherwise I cannot claim the warranty. He told the price was 2000 rs. When I saw the price of the product in amazon is around 900 rs only and same with the Scalegon Product, it was very low on Amazon. I have made a google payment for him and I didn’t get bill for that. Now I am concerned whether it is a original product or not and Is it true that Whirlpool will not accept my warranty claim if I don't use the Calstrait provided by the Installation guy by paying 2000 Rs?
I purchased both of the products for 3300 Rs.