Lancslass

I was hired in a school for kitchen assistant and i was told they really are clamping down now, you cant start work till your crb comes through. Anyway 7 weeks later it arrives and i start work. Now another person has started in same job and department as me and there still waiting for crb to come through, they are allowed to serve children on food counter but not go into dining area. This seems to me to be all wrong but i don't know where to go to complain.