Broker Price Opinion First Valuation Still Owed $1,400 for Valuations performed Westminster Colorado

Performed 37 Valuations from Broker Price Opinion aka First Valuation from 12/19/13 to 3/19/14 for $1,630.  I was told they sent my check for services performed and they they only sent a check for $230.  I have been hounding them for months for payment and continue to get the run around.  Apparently this is standard procedure for them considering all of the complaints on here.  Do Not Perform BPO's/Valuations for Broker Price Opinion or First Valuation.  They are a terrible company.  I've been in contact with Sarah Sandoval and continue to get ther run around.  First it was they don't pay for 90 days.  Then it was I am scheduled for payment this month.  Then next month.  Then they finally sent me a check it it was for 1/8 of what they owe me.