If they were 100% innocent and had absolutely nothing wrong then why did they ran away to UK? That is the correct question to ask, if they had so much money just stolen and everything else is fine and they can come back and make the business continue without a problem then they should have done that to begin with. The only reason they went to UK is basically to hide their money there and that's it, now they can come back and claim that they are hacked just like everyone else and they are victims as well.
I don't think that these two will ever return to South Africa. The advantage with UK is that it never deports criminals, if they can prove that their life is in danger if deported. In the past, foreign pedophiles and rapists have managed to overturn their deportations, by arguing that they may face physical harm if sent back. And for the financial criminals, it is even easier. London is being regarded as the hub of white collar criminals. The government in UK doesn't care if your funds are stolen from somewhere. As long as you are rich, and is able to spend that money in the UK, you are welcome there.