Century 21 Resort Mart Real Estate Paid fee, but now won't return calls of inquiry. Also, company is using Cantury 21 logo illegally. Branson, Missouri

Several years ago I paid a $639 fee for Century 21 Resort Mart Real Estate to advertise and market my time share property.  I recently called them to make sure they are still listing/advertising my property.  I now cannot reach a person, and I can't get anyone to return my calls of inquiry.  Upon calling the national Century 21 offices, I found out they are not a licensed Century 21 office.  I mainly trusted them because of the Century 21 endorsement.  All the literature they sent to me several years ago had the national Century 21 logo as part of their letterhead and brochures.