Walked Out

I had to walk out I had been working at a Mexican restaurant for about 2 months.I was constantly being yelled at for minor mistakes nothing crazy.I noticed I was being treated vastly different from the other severs who were younger and white(I'm mixed with Black and Hispanic).Then to top it all off I haven't received my check since I started I've been then since we opened and nothing I was told it was coming soon and they had no bookkeeper.I understood it was a new restaurant gave them the benefit of doubt but still nothing.Then I was told when I tried to get my check "I don't give checks to people who walk out".Now I know I shouldn't have walked out but I truly was done being treated horribly as if I was no a person.It's been 4 days since I tried getting my check no call or text about it I went to the labor union already nothing yet :/