REFUSES TO PAY HIS ACCOUNT WITH US

We supplied Virgo Logistics with drivers to deliver their goods from A to B. They hired them for a period of time and we billed them according to timesheets that Virgo signed off in acceptance of the hours worked by our drivers. They then just refused to pay their account and made pathetic excuses about my drivers and how bad they were. The problem is that these complaints were made 3 months after we stopped supplying them (due to non payment) and only due to me saying I would hand them over to my legal department. They received drivers that generated them income by delivering their stock for them and I paid the drivers their wages for the period they worked at Virgo Logistics - so at the end of the day I am out of pocket and Gerhardt Theron at Virgo refuses to settle my account. He is aware that to try and sue for anything under R12 000.00 is costly and never ends with good results as the court costs are high and it ends up costing more. This type of business behaviour is extremely dangerous, I am a small company who relies very much on our clients to pay us for work done (as we pay wages to the staff prior to receiving money from the client). They should be closed down!