BillMatrix review: Failure to honor commitments

My bank made a mistake and failed to pay a bill submitted through Bill Matrix; they placed a block on my business account. When I found out about this, I contacted Bill Matrix and was instructed to send a letter from my bank explaining that the error was theirs, not a problem with my account. That was done in early May 2013 and I still (9/6/13) cannot get my business checks accepted!. I have contacted them repeatedly and they continuously fail to correct this.

I have the necessary documents to prove the letter from the bank was sent, but keep getting told that my proof is worthless to them! Not to a court.

Today, I was given a 3rd set of instructions -- different again from the last 2 calls -- requiring me to get my bank personally involved.

This organization is just giving me the run-around.