Forced to work

Currently in my big exam year so i have taken I year out at my part time job still work occasionally now being forced to wrk or else I get fired because the owners grandson needs to join the payroll and they need to make space for someone fire me because im not working i would considered myself one of the more hard working in the job but im not related to the owner or wealthy so i dont have as high of a standing

Is this a fair thing to do