Michigan Realty Solutions Another Vendor Ripped Off! Richmond Michigan

We provides services in Barberton, Ohio to secure a vacant home for Michigan Realty Services.  The home had been vandalized and needed to have windows secured, glass cleaned up and doors padlocked with a keybox installed.  The initial services were provided without any issues and pictures were also provided for proof of work compleled.  Unfortunatly, the multiple pictures were not enough for additional pictures were needed, so another trip to provide additional, redundant photos were provided.  

These services have not been paid for by Michigan Realty Services.  Per the salesman who we were working through, the invoice was "passed up the chain" and "would be paid within a month".  The services were conducted in November of 2014 and to date, no payment.  

Several calls have been made, messages left, but no one has returned calls nor made any attempts to pay for the services. Within the last few weeks, no one is answering their phones.  Would someone contact us regarding this issue?  Are there others?  Our services are over $500.00 and for a small business, this is not a small amount.