Yes, they have a full simulation section at SAS Simonsberg, including
a Bridge Simulator.
It would be interesting to see what the BoI concludes. Simon's Town is a tricky-ish harbour, over the years both the Royal Navy and the SA Navy have seen their ships ding the edges during entrances and exits, especially during bad weather. Still, a signal to slow down should've been executed quickly, so whether this was a crew mistake or a mechanical failure it's pretty serious and I'm sure Flag Officer Fleet will want that report sooner rather than later.
Good work by the tug crews to keep things from being worse.