I would say so that is a bit much and indeed another job should be in the making right about now. I always thought that when someone calls off that they were to find a replacement. I work at an assistant living facility and when we have a call off the person is to call three people to see if they can cover there shift if no one can cover there are other options. have you read their policies against this kind of issues? is there someone you can take this too? you should have all opition avalible and ready to fire back.