WS - if he was a contracted worker, sounds to me like he got hard done by.
The limitation period on a contract worker being considered full-time is 2 years.
Need to take a look see at his contract, but on the limited info I have, I'd say he is up a famous creak without the needed paddle.
As for Diaw, his sounds a little bizarre (when doesn't it). No disrespect to him, but it used to be the case that there was only one Labour Court - regardless of where the local of the case was from. I admit, that could have changed.