I NEED A BREAK!

every time when we 2 same days cannot work, and need people to work, every time I'm the one who sacrifice my day! which means i have to leave earlier and cannot stay with my friends till go home tgt :( and everytime last mintue inform me. and sure our plans for the day will be affected. i know can earn more money, who dont want. but im angry with de is why everytime when i have to work even though i marked out the day at the schedule that i cant work. i cant play and enjoy with my friends even during holidays. sian ttm.