Headlight bulbs - quality shocking replaced 4

I have had my Chevrolet Captiva for 1 year and 8 months and have replaced the headlight lamps 3 times and have to replace the front left for the 4th time. You pay so much for the vehicle and have to keep replacing the headlights - I am shocked at the quality - when I complain to the parts clerk at the dealer he does not know what to say.