KB Build Dave and Sean With KB Build did not pay my company for work that was completed, Internet

My company did work for KB Build on a home in Baton Rouge, LA. The work was completed in March 2010 and passed an independant inspection and Dave or Sean said that this job lost money for Them so they tried to negotiate the price down. I had an agreement to do the work for $1,641.00 and I said that I wanted full payment. I have called and Emailed Dave and Sean since April and they have stopped returning my calls and Emails. KB Build primarily works in MA. but they contract work around the country for reverse mortgage companies which is how I got swindled. I just wanted to make sure that comsumers were aware that this company is Dodging my request for payment.