I worked there for over 9 months and they screwed ...

I worked there for over 9 months and they screwed me out of my production bonus when i quit.... I gave them a 2 week notice and worked till the last day. Did everything right. I earned the bonus and they did not give it to me. If they are going to treat employees like this over a lousy 50.00 gift card that they earned i wonder how they treat their customers or suppliers