When I read this I almost looked at some legislation. The problem is that to the best of recollection (which is pathetic at best) there may be a provision in the films and publications act which can be used for the prevention of importation of media that would constitute "grey goods". In terms of intellectual property law, there is a doctrine called the exhaustion of rights. Basically what means is that once something has been legally bought by someone, they can do with it as they please (there are some exceptions). A good example would be sneakers... once a supplier in the USA buys a ton of Nike sneakers, they are his, and he can export them to South Africa to another supplier, something that would upset the company that has been appointed by Nike as the sole distributor for Nike in SA. Sneakers imported like that are grey goods.
However, when it comes to other items and products, there is more than one act involved. Like with a CD or a game. A game bears trade marks, but also constitutes a medium that is subject to the film and publications act (i think that's the act we're dealing with). It however also falls under the copyright act.
Unfortunately, there are provisions in the copyright act that prevent the importation of copyrighted material. Depending on the relationship between Ster Kinekor and the overseas company concerned, they may have the ability to stop importation. This is a ROUGH opinion. I used to be an IP lawyer, but cannot remember that much..