National Telecom Services slow pay how about no pay for work done Pittsburg Pennsylvania

This company does not pay its bills.  I subcontracted work for them in Jan of 2014. The Invoice I sent them was for a little less than $700.00 They were paid by the company I did the service order for in Feb. 2014. for a lot more money than what my invoice was for.   It is now may 2014 and I still have not received Payment.  When I talked to Mike in accounts payable about this He said they were having financial difficulties.  Yea right!  When I told him I needed the money now he stated that he would mail me a check but good luck on getting it to clear. Two weeks now still no check even if it would or would not clear.  I don't even care about the interest.  No one with in 150 mile of here will do work for National Telecom Services.  Lesson learned get a credit card up front for at least $500.00 before doing even an hour of work because it will cost you that much in time and effort to collect for that 1 hour.   JUST SAY NO TO DOING ANY WORK FOR THIS COMPANY! SAVE YOURSELF THE HEADACHE!