Completely Dissatisfied with my Porcelain Veneers! Can I Have Them Filed Down and Not Get New Ones?

HYou can have them filed down (contoured) but the risks are they they will feel rough because you'll be removing the glaze on them AND you could induce micro-fracturing in the veneers.   Additionally it might be hard to find a dentist to contour them because basically once they start contouring they "own" what happens to them (Fracture / break) and then would be afraid they'd be held liable for replacement.  

Sorry to hear you are unhappy with your veneers, In terms of filing down the veneers that can always be done but understand that when you adjust a lot you will ultimately change the color as well.  They can crack easily and may crack after they are adjusted.  In my opinion I would replace them.  That would be your best option. 

Porcelain veneers can make amazing smile changes. One of the issues I am observing in cosmetic dentistry right now is that "everyone" is a cosmetic dentist. There are a lot of approaches to making veneers that tend to make them not look right.

Do some research first. Find the most experienced, cosmetic dentist that produces that most consistent results. Don't let anyone else touch your veneers any more. If you keep having them filed, shortly they will look worse, then there will be no hope for this set of veneers.

A highly skilled cosmetic dentist will give you the best chance of making this set look as good as possible. They may be able to be improved, but after not liking them for four years, you will probably never love them. You will have to accept some compromises.

At some point, you will need new porcelain veneers. Again, make sure to have the BEST cosmetic dentist possible. Make a very specific list about what you don't like, and what your concerns are. Don't start the new veneers until you are highly confident that these issues have been addressed.

Carefully assess your concerns while you are in the temporary phase. Most of these concerns should be addressed here. Don't let the final veneers go on until you feel comfortable with what you have previewed.

This will likely be much more expensive that what you paid before. The skill, care, judgement and artistry to deliver this level of care is rare. BUT, when you finally have the smile you love...it will be priceless!