Twin City Transportation - Little Rock, AR

Had a signed contract to load with this company on 7/27/09 from Houston, TX to Little Rock, AR. I invoiced them on 8/3/09 for the load and as of today, 9/14/09 have not received a payment (42 days). The driver offered great customer service, picked up and delivered the load on time and of course paid for the expenses out of pocket. I faxed them, reminding them that their payment was past due (30 day payment contract), and that I expected to get paid on time since their load was done on time and that if I didn't hear from them giving me the check number and when to expect it that I was going to contact their shipper/receiver in regards to this matter. If I don't receive their check in a reasonable amount of time from when I was told it would be out, I will still do so. A person named Shawn called me, gave me the check number, said it was going to be written that day and irately told me that I wouldn't have to worry about it again. Think he was suggesting that I wouldn't be able to get a load from them again? Did he actually think I wanted to? I'm thinking I should have been the irate person, he broke his own contract. These same companies put all types of charges, and automatically deduct them from the payment if they feel something didn't go right, shouldn't there be a way to get paid from them for late payment? I report brokers like this to transportation credit companies, so that their true rating is available to carriers and I post it on every available trucking Forum. I've even gone as far as to post flyers all over the country just to be sure other carriers know this info. I have proof of my incident and aren't afraid to show it. If enough of us do this, companies like that will be out of business.