bakery worker - Donut Maker/Cake Decorator Weis Markets Employee Review

I was hired as a bakery sales associate part time. But now I'm a donut maker and also a cake decorator, I wasn't given a pay rise for it.The pay is crap $7.25. When I applied for the job it was advertised as having all these good benefits but that only applies to full time employees which is basically impossible. Since I started working there 1 full time employee retired and another is about to leave but they won't bump you up to a full time so they don't have to give you benefits. As part time you need to be working there for 2 years before you are entitled to 1 weeks paid vacation. The hours are unreliable, I have had weeks where I was scheduled 8 hours to a week scheduled 34 hours. I get on with my manager for the most part but the other employees don't so there can be a lot of tension which makes it a little awkward at times. They have a habit of changing schedules after they have been posted without checking with you first of it was ok that they changed it, you may have made plans or had an appointment.