If you can't get your employer to restore your benefits, then I second the idea someone said about visiting a dental school. When I chipped my tooth from biting into my tongue piercing, the dental school was able to patch me up for a lot less money. The only tradeoff is that you might have to do a couple or three different appointments before you'll actually get the dental work done. One appointment will be to collect all of your information, and they might do a separate appointment to get your mouth all cleaned out prior to removing the wisdom teeth. Check out your local public university or community college (dental hygienists) to see what's available.
You'll also want to ask about payment. Say upfront that you don't have dental insurance. Explain your status -- presumably single, part-time employment, and whether or not you live with parents. Ask about billing and payment options. My tooth repair cost about $250 total, but they billed me and I was able to break it up into smaller payments. I got the bill paid off in a few months.
In any case, wisdom teeth usually need to be extracted. I had braces as a teenager, and I had already four teeth removed so that my teeth would align properly. Three grew in fine, but the fourth grew in sideways and caused me a lot of pain when it tried to break through the gumline. The problem with wisdom teeth is that we simply don't have much use for them. The molars we already have do the trick. Sometimes they might just grow in fine and accommodate any existing space in your mouth, but this isn't often, and dentists often recommended that they all get extracted to prevent any complications. While you're working issues out with your employer, go check out the university dental services and see if they can't work with you.