In next month I will start a new job in a big corporation as a software developer. It will be three months trial period. I will be employed for full-time (40h in Poland), but few days ago I acknowledge that my job will require nine hours each day in a workplace as there is mandatory one hour non-paid lunch-break. This was never the case in my previous jobs in the small and mid-sized enterprises I worked for, I always had about half hours for lunch during my normal working hours.
This situation makes me quite angry as from my point of view I will be working about 20 hours monthly being unpaid. I would probably have declined this job offer in the first place if I would know about this extra hour earlier. I study in my free time and if I spend 10 hours at work (one hour for commute) I'd be too tired to take additional classes after that.
I'm not sure how to handle this situation properly. Should I talk about that with my manager (what should I suggest in that case?) after starting my trial period or should I just start looking for new job (should I do that immediately or after some time)?
Bottom line is: if I had stayed in my foregoing work and start working 9 hours daily (lunch-time included) I would have earn ~20 percent more (9th hour would be overhour, paid with 50% bonus). In my new job I will be earning ~10 percent more than now. So this unpaid lunch hour doesn't sound like good deal for me.