Pay day loan help please?

National Credit Adjusters keeps calling my phone saying that they are a third party collection agency attempting to collect a debt. $450 dollars is what they say i am to owe. Namakan Capital LLC aka Sandpoint Capital aka Clearway bay marketing, is where i guess i got this loan from. The loan was only $200. I live in Michigan and i need to know if this a legal pay day loan company in the state of Michigan. I also do not know how to approach this or what my next move should be. So if anyone has ever dealt with this please any advice and only advice would be appreciated. Thank you.