Sage Sales Account Manager - Field interview questions

1st Stage - Recruiter Telephone Call 2nd Stage Manager Telephone Call 3rd Stage Sales Manager 4 Stage Head of Department I was left a message stating my start date had been pushed back but had no offer. I followed this up with a call and was told someone would call me back which they did not. I had email the Head of Department for clarification which led to the Head of HR calling me to explain their had been an error. Unprofessional to say the least