Your vacation check should have been paid when you left your employment on a discharge (immediately) or within 2 weeks if you quit.
They are called "entitlements".
You need to contact your former hr department and ask them to "run" your entitlements. Then advise them that you need to be "paid off" as your employment ended.
Your check is NOT pro-rated, and its paid at 1/52 of your last years earnings.
If you worked for 2 years, you should be entitled to both vacation, and option days "unpaid" as of when you left.
YOU need to follow up, as the company will not follow up for you.
The ball is in your court.