Adobe Source Code Auditor interview questions

Very unprofessional! I applied through referral and was contacted by the recruiter and scheduled a phone screen. I too prepared for some basic HR interview questions. But when she called, she told the position has been filled already and that there are currently no other openings for my profile. If the position has been filled already, why can't she email me to inform and cancel the discussion? They simply wasted my time. Never even respond to calls from adobe recruiter. It looks like they just keep calling candidates to kill time. Feeling very frustrated!!