Performance Food Group interview questions

Originally had a phone call with the hiring manager where we set up an in-person interview for the same week. We met at a hotel local to the area in which I was interviewing. Interview was conducted in the breakfast/dining area of the hotel lobby with two individuals and it went well. They informed me on the spot that I would be moving forward to the next round of interviews that would take place the following week and they would be reaching out with more information regarding date/time/place. They even gave me topics to brush up on prior to the 2nd interview so that I would be most prepared. I sent my usual follow up email which included me stating that I was looking forward to speaking with them again soon. Days went by and I followed up by email/phone call/voicemail/text message and never heard anything in return. I find it unprofessional and rude to waste my time after telling me I would be moving forward in the interview process. I would've had no issue if they had just informed me that they found a better suited candidate, but after multiple attempts to contact the hiring manager, I was ultimately left with no response or feedback from PFG.