Cal Engineering Solutions interview questions

The interview was very chill. Had a phone screen with the recruiter first and then a virtual interview with the manager. The interview was easy and the manager only ask one question

I got contacted through email asking when I was available for a 10-15 minute interview. Gave them my number and agreed we would call 10:30 the following day. Never got a call from them, sat and waited for an hour extra. Sent a mail telling them I never recieved a call, and if some other time would be better suited. No response to this day.