Unclear

The HR department is really incompetent. They canceled the interview at the last minute, just 20 minutes beforehand, and even though I had already submitted my résumé, they claimed they didn’t know my phone number and therefore couldn’t contact me promptly.

Also, after the interview, they sent a thank-you email saying they would reply by XX date, but then completely disappeared. Although being ghosted is common, I don’t understand the purpose of sending that email—it felt even worse than receiving no response at all.