Elica — Newly replaced Chimney LEDs went dim within month

I bought Elica Silent version of Chimney (Worth Rs 17000/-) purchased in Nov, 2017.

Its both LED went dim, hence I got installed 2 new LEDs worth Rs 650/- each on 27 Sept, 2021 from Elica authored technician.
Now both LED, one LED has gone dim within 25 days and another in 31 days. I followed-up with technician and Elica customer care to replace the faulty LED with new one but they are denying saying that Chimney is not in warranty. But this is not the case, any new part which is installed must have certain warranty else why I will go for new part installation. Any LED we buy from market carry atleast 2 years of warranty.

Your technician installing sub-standard faulty product/part on an overpriced amount and also not giving warranty on top of it.
LEDs worth 1300/- if goes dim in a month then it is faulty product and a fraud case.

This is definitely not acceptable and fall in a cheating category. Please arrange a replacement of LED immediately.