These are low cost parts, and they don't change parts from left to right.
It's not clear "after what period of service" the sound started coming from left window. If it is within a month, call hem and inform them. They'll rectify.
I'm a old timer and prefer the Authorised Center. Unauthorised ones (FNGs) are good for tinkering and paint job, IMHO. For other activities involving moving parts, FNGs are cheaper but their mechanics"generally" spend less time with the car; chances of half cooked activity is more
. What would've been less than RS 25,000, a friend ended up spending more than Rs 40,000, by first going to FNG followed by a visit to A$$. Stick to A$$
. Download Hyundai Android App. It will ALSO show ratings of their A$$. Select as per your convenience. Done !
I think there's only one EON ownership thread in TAI
. Why don't you start one ?