Dentist responsible for crown shape and/or reshaping the crown, matching crown colors and pain?

I recently got all my lower teeth crowned with porcelain. The six teeth in the front are thick blocks, they look horrible. I also have pain when brushing two teeth and a 3rd that I complained about being sensitive prior to is still sensitive to touch and temperature which he told me would resolve itself with a permanent crown. Lastly the back crowns look like they're a different color than the front. I just spent over $10,000 with insurance and I would rather have a lower denture. What can be done?