Altimetrik NodeJS Backend Developer interview questions

I got call from their HR for interview. And another HR sent interview invite. The day I joined the invite and waited for 15mins, called the HR who had sent the invite, she didn't picked up the call, called other HR and she was asking me again again that if am I sure that I joined on correct time and I should connect with the other HR. I dropped the email if they can reschedule but, never heard back from them ever.