Interesting, its a bit of topic and probably goes a bit too much into details, but did you go to a lawyer and thought to sue them? Its your money.
Anyway, DHK is a good job. The management is like in any other company, they don't care about you. Rules are always different when its to their advantage.
For cadets its not really the right place, you do about 300h per year, so you don't make a lot of hours. After 10 years you have 3000h, by that time your friends are already in command in other companies. But the job is good, pay is alright and you don't have to worry too much about the future, apart from the Brexit.
