BAD SERVICE!!!!

We bought headphones for my son about 2 months ago. After a month the headphones microphone went dead. We took it back and they gave us a new pair. After about only 3 weeks the new pair 's microphone also went dead and my husband took it back. Now their head office is full of nonsense and they must now test it on a X-Box. They said on Friday they will get back to us during the weekend and it is Wednesday and we still have no reply from head office or owner. This is unacceptable and BAD SERVICE!!!