Autodesk Sr. Project Manager interview questions

Strange hiring process. I was interviewed in Montreal, Canada. HR told me they will give me a feedback soon. Until now, nothing strange. The strange part came... : I got an email from HR telling they would like to organize a phone call. I gave my time availability, they confirmed, and... they never call at the agreed slot. No problem, I tried to call again : unreachable. Later they explained they have a last minute urgency. No problem, let's plan again... We planned. and the same play again... No call from them, and unreachable. I tried 3 times in total. This is absolutly unprofessional. I never got any feedback finally and I decided to stop by myself.