For the record, it often takes longer than four minutes to get an answer, especially on a Friday night. The responders here are volunteers who do this on their own time. This is not Time Warner - operators are not standing by 24/7 to answer your call.
That being said, okay, no call no show is not the case which you proved by "texts". What was in the text? A call in "I'm not going to be in"? "My bus is late but I'll be in by 9:15"? Were the texts responded to? Had you been informed in any way of what was or was not considered an acceptable call in?