Sun Life Administrative Assistant interview questions

In my completed application, as per the employer’s request, I added my 3 available interview dates/times. The employer sent me her interview date and time that was not any of my offered. I replied asking if her offered date/time could be adjusted. I never received any reply, or any message or explanation from this employer. My application was dismissed just like that. This is very unprofessional and discriminatory action from the interview organizer.

Reviewed basic premise of job to me. Offered me the job on the spot, I declined as it was to be an unpaid internship and they were not willing to negotiate. Then proceeded to ask me about my thoughts about the other hiring candidates that they reviewed