Perhaps they didn't hire you because they are having money troubles? It sounds like that could be a problem with them.

People will generally do something if it becomes more of a problem for them NOT to do it. You said it's been 2 months and you've ONLY sent "several emails."

You need to set aside 15 minutes per day and call them every single day until you have your money. You need to become a big pain in their ass so much that they know that at 11am they are going to receive a call from you asking where your re-imbursement is. Don't email because they can easily be deleted. You need to phone and be polite but firm.

You are definitely right here to get this money.