Honda Motor

I done my new civic service in Honda dealer for 3 years. Today my friend working in the work shop found that my civic car gear box spill out with oil. And I screw gone. What happen with service within this unprofessional? What for I spent money to do the servicing in Honda ? Air filter in dirty condition and the box very dirty with full of dust. Is this the professional service of Honda dealer supply to cheat their customer dunno about car? And they never inform me what happen with the spill oil problem. My email is : [protected]@live.com
I hope to get reply from Honda company