kittens

So a few weeks ago my drivers headlight went out. I paid a lot to get the bulb and ballast replaced. After getting the work done and the light back on I was told there was a small crack in my headlight assembly. The dealer (harte nissan) told me this after they replaced the bulb and ballast. The light is on now but the crack is sill there. Whenever there is precipitation I have to tape my headlight now.

What am I supposed to do? I looked online and I can find a headlght assembly from go-parts.com for 427. Is this the real thing? I paid way too much for the bulb and the ballast then. I don't want to get screwed again. Thanks