Serenity Healthcare interview questions

Got an overview interview to go over position and answer basic interview questions and the interaction was pleasant and positive. I was waiting to hear back when I was invited by Serenity Healthcare to a job fair and to interview in person. I selected a time and registered and received a confirmation email, however the night before, I received a cancellation email for my interview. Confused and hurt, I emailed the HR person I had received the job fair invitation from and asked why it was cancelled and to get an explanation. The next day I received a superficial response and apology that didn't give me any answers as to why they cancelled my interview. The cancellation left me with a bad taste in my mouth about the company and management. I feel like they may have not reviewed my resume (didn't have enough experience for a training role) or mixed something up and didn't intend to interview me. Whatever reason, the lack of communication and sneaky cancelling of my interview made me glad to not move forward with them. I wouldn't want to work anywhere if their hiring process was this mismanaged and negative.