You can pick up singles on ebay look for a wheel with light scratches they are the least expensive.
Or you can buy a set of Sonic or Cruze wheels if you want a change in the look of your Trax.
Your wheel look like it took a light hit, it does not appear to be bent.
You can have it repaired, check your local phone book for a wheel restoration shop with a mobile service, they will come to your home or your work to do the repair.
Compare the repair price with the replacement price, go with the one that suits you.
If I were you I would rub the scratch with white compound, then see how it look, I think most of that scratch will vanish.