That sucks to hear, cooldude.
Unfortunately, it's been my experience that 'vigilante justice' is probably the best approach in getting your money out of a MS/Merch company. By that I mean naming the company publicly and calling the president/owner on a daily basis until your check arrives.
Almost one year after filing my BBB claim against Restaurant Evaluators, I was informed that the claim had been dropped due to the nature of the complaint. As IC's, we are business owners. The BBB would not handle a business-to-business complaint. They focus on consumer complaints.
For small claims; even if you went through the hassle of filing the claim and getting a judgement, it's another difficult process to force them to actually pay it.
We shoppers are basically on the loosing end of any legal battle for pay. The options for seeking remuneration are limited and only marginally effective when used.
If the company is part of an organization like the MSPA, you could also appeal to them to put pressure on the company.
My best capture of an uncollected debt came from visiting the office of a MSC hat had all of the earmarks of going under. When I researched it and found out the company was local, I stopped by unannounced and walked out of there with a check. The company shut down a few months later and left a lot of shoppers being owed money, so acting in a timely manner can make a difference.