ComPsych Clinical Team Lead interview questions

I was scheduled for a 30 minute interview. After a whole lot of preparation for the interview, researching the company and spending a considerable amount of time preparing. The interview was suddenly cancelled half an hour before. Received an email simply stating: "We have filled this role. I have cancelled our interview for this afternoon". I find it rather disrespectful, as my time and effort are equally important. Not a thank you for my time. Not an I am sorry for such a short notice. Manners do matter! It says a lot about the culture of the company and not in a positive way.