In the last 20 years, it seems that computers have taken over. They're in our homes, they're in our hands... darn it, they're soon going to be in our heads, for sure!
Curse a few times before ringing them and explaining you needed it tonight and demand they apologize You are disappointed but try to make a new plan You get so angry you think of some way to punish them for this You ring them up and give them an earful. The cheek of it!