Now there's a bad name to remember, Keith Irwin. I worked for him out of Lanseria flying his Baron 58 (ZS-IB#) for a company called Select Air back in 1989, and never really got paid. My salary cheque bounced a few times, even a few times on the same day after being assured that all is OK.
I am surprised that the Angolans didn't send up a Mig or two, mind you their B737's could do a good job of taking planes out of the sky, they almost took out Cessna 402 in Namibia.