Option 1 (cheaper) 

Go to industrial area - there are many denting/painting workshops in that area. I know one workshop in street no.27

Option 2 (not so cheap) 

Or, call up your car dealer and get the location of his workshop. If your car is Honda, you can take it to their showroom and hand it over there. They will take it to their workshop, do the repair and call you when its ready. I am not sure about other makes.