Stantec Project Manager - Water/Waste Water interview questions

I applied directly through Stantec’s website for the PM position. I was contacted initially by a talent acquisition partner to go in for a first interview (albeit late - after a few weeks of applying). I was then promised that he would send me a list of available dates/times to go in to meet the hiring manager/team. This however did not come to fruition - it was radio silence after that even thought I tried to contact them via telephone twice leaving voice notes. It comes across as disrespectful to the candidate and a disregard for their time and effort during the application process.