Bryan Bauer, DDS, FAGD, FICOI

It sounds like they changed color very quickly. This leads me to believe they were either done poorly (the bond was not good and there is leakage) or the product used was not very good. Composite will stain but not in one month. Do you eat or drink anything with turmeric? That will stain things quickly.

No veneers are not the right answer for you.  Even if you were to remove that canine, which I would be very surprised if you could find a dentist that would agree to do that, you would still have other issues that require orthodontic care.  Braces and maybe gum surgery after if you still were not happy.

Unless u are doing braces for other esthetic reasons seems like overkill to me.  My wife, an ortho, and I recently did this for someone who was having orryjo done for crowding.  We extracted the tooth one root at a time to help control the back tooth from tipping while coming forward, which is the main complication you'll likely see.  I also did another surgical step of removing some of the hard bone to help facilitate the movement. It would be way easier to just do an implant in the area and cheaper. 

As a consumer, expect to pay well over a thousand and probably closer to two (depends where u live) to get a single front crown to match consistently.  ideal treatment would be invisalign to straighten and then maybe getting the front four done together. If the doc can't show u photos of cases similar he/she did then assume they can't do it. Dobt bother going cheap on this or U could just as easily be worse off. If you find right doc they could redo the one and be fine. 

Most likely is that the crown is slightly high and needs to be adjusted.  This is fairly common.  Tooth could be cracked or broken under the crown meaning nothing can be done bu take out the tooth.  It sounds like you went to an endodontist for the root canal so your next step should be to go back there.