Lenskart — Incorrect powers of the lens and no action about the mistake done by the store.

I had heard a lot abt lenskart but to my surprise, I was cheated by the product I received from the company.
I had ordered my glasses from lenskart in Pune due to the Pandemic it was delivered to my place in perfect condition. I wanted to try the progressive lens from lenskart so placed the order accordingly. After using them as adviced by the optholmologist for 15 days I started having problems with the glasses. So went back to the store they said that it was a minor problem of the lens which shd have been tilted. They tilted it and said to continue using them. But the problem still prevailed so in order to get the lens power checked I visited another store of lenskart wen I got the print of the power there, it was less power than I had asked them for. So I went back to the store and I was surprised to hear their reply.
They said each store machine has a default miss of .25 power. And they cannot accept the print of the other store.
To my surprise a company having a nationwide reputation has failed to deliver the correct power. The claims made by the company abt perfection and precision are all false. I am unable to use the specs for which I have paid an amt of 4, 000.
Inspite of repeatedly asking to fix the problem they are asking me to upgrade the lens to a sum of 7, 000 for which too they don't guarantee. So wat would one call this attitude. Fake or cheating.