Was this unprofessional?

Im hopeless and its only getting worse. Last week I had a job interview at a retail store. They told me they liked me and scheduled me down for a second interview with them on Monday. Two days later I get a call from them telling me that they have to reschedule the 2nd interveiw due to the head managers illness. After hours of not hearing from them that monday, I call them and the employee that picked up told me there were no managers in but she would let one of them know that I called. It's been 3 days since I was supposed to get a call and now I've got my hopes up for nothing. Why would they tell me they want another interveiw with me and not call me back? 

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