Do you ever hate calling in just because you know you have to deal with their whining? Management at this job of mine knew about my new availability for 3 weeks now and they still scheduled me hours that I cant work anymore (shifting priority over to my real job) They didnt see that as a reasonable excuse, and I quote "you were with us first".
Don't get me wrong, I like working for Target: Girls

My issue is being an [censored] enough to pretty much tell them "No, you scheduled wrong, I can't come in", effectively screwing them over.
Like I said, if I could work the shift I would, but they are so hard edged about their own mistakes that it'd be my fault for not showing up. Any suggestions? I don't want to burn bridges, but it would feel so damn good I am tempted to do it anyways!