Bro, dealerships have a mostly parts replacement model, not repairing. You can visit them and ask them to evaluate what the issue is. But have an opinion from a known mechanic, maybe a close friend can recommend so you have an honest opinion. Although I prefer 3S, they charge extra, but you can atleast have satisfcation. And all 3S are not same. Here in Karachi, Danish Motors is very good. They even followup on your visit for satisfcation.
I have 2015 Wagon R VXR, just reaching 50k KM. I have always went to 3S for oil change and maintenance. Never faced any major maintenance related issue uptill now. Recently got the plugs changed and throttle body cleaned. My suspensions do make some noises, which I think is due to bushes in the tie rods getting worn out, I will consider getting them replaced, maybe from 3S aswell.