Fable Data interview questions

Fairly standard remote interviews. First with HR then with line manager. The HR person seemed very nice at first. But when I declined the position in favor of another company, she flipped and said something along the lines of: "We'll see how it goes for you with them".

I was put in touch with Fable Data through an external recruiter. There were two calls with an HR person, who told me that there would be a face to face interview with their chief data scientist in the next few days. Silence afterwards. More than a week later I learned through the external recruiter that I had not been shortlisted. Fable Data did not have the courtesy of giving me a call or sending an email to tell me this, it strikes me as quite unprofessional, to say the least, more so when I was applying for a senior position