Pilgrim's Pride review: Management

Now I've worked all year to be able to take some parts of my vacation days. I've worked for people why they have taken there's so today I'm supposed to be in Arkansas because I put in for vacation last week to be off today and tomorrow. Simply to be told by my manager that it's my job to find someone to work my shift so with that being said sounds like if I never find someone to work my shift then I can never take vacation what is the reason to give a seven day notice I thought that was so that the manager had enough time to revise the schedule so u mean I'm supposed to find my replacement so who is at faught if I go ask another employee to work my schedule and it Sparks up a confrontation between the two workers because the manager has put me in that situation to do a manager job I have no power to make are tell another employee to work for me but he does and refused to use his power as a manager so I guess I'm stuck at work are lose my job are take points once again seems like abuse of authority to make a person do things to keep him from being the bad guy it's getting ridiculous once again.