In Sept. I used a non-permanent hair color on my hair. My bangs were mostly silver and the color turned them a color I did not like. It has been 2 months and the color has not come out. If I use a color fix solution, will I get my natural silver back?

Usually, ColorFix will remove most demi-permanent colors. There are some "semi-permanent" colors that are "direct dyes". These have to be bleached out. Most likely, ColorFix will get the dye out. However, you are apparently expecting to get the "natural silver" back. That is unlikely. You'll have to re-dye after using ColorFix.