e-bot7 Business Development Associate (BDA) interview questions

Had an initial phone call, it went well. Then the lady said that she will send me 3 long tasks to do ( which I did!!) and to book in an interview, which I also did. It came to the day of the interview which was booked 2 weeks in advance and they cancelled in 2 hours before! They then didnt respond to me at all to reschedule or anything. VERY UNPROFESSIONAL AND TIME WASTERS. I did them tasks for NO REASON.