I'm not entirely happy with the shades of my frontal crown & veneer. What should I do? (Photo)

I needed a crown on my front tooth due to darkening from a previous root canal. I was advised to put a veneer on my other front tooth for "aesthetic" reasons. After getting my procedure done 3 weeks ago, I am not entirely happy with the shade. I expressed concern to my dentist and she said it was perfectly fine. I also signed a waiver saying i was satisfied. My dentist dismissed how I felt and I am still not satisfied with the shade of my two front teeth and don't know what to do.