Pocket Gems Software Developer interview questions

I applied online through their website and got a email back with a link to test which was only on java, but as I am a c++ programmer and have no experience with java I let them know and then they took about two weeks to reply then scheduled a telephonic interview with one of their programmers, it was a shared coding test. It was a easy question, but worst interview ever, the interviewer was really really bad, he was not interested in talking the interview, he was putting the call on mute over and over and I could hear him laughing and talking to someone. Why waste you own time and other person's time if you don't want to take an interview, say no in the first place.