just a quick thought on contracts etc. remember in the uk when there was a few problems with endowment policies and you could put a claim in for being mis sold the product. would this not be similar to a bond/training agreement. ie if you did not have the product explained fully before you signed then you could challenge it later.
anyway why would you want to "challenge" the agreement are you not better to try and "negotiate" you might be amazed at what can be achieved by being honest
if you dont like the T&Cs then dont sign. if you have signed and the T&Cs change well the ball is in your court
As always on an international website you get inputs from around the world so check the location of the person offering you advice as it might not be relevent in your state/country/continent/hemisphere/planet!
good luck with your quest