Abj Heat & Air

Abj Heat & Air put a new unit in my home last summer. It failed to work about 2 months ago (the hottest part of the summer). I have tried EVERY SINGLE day since it broke to get in touch w/them w/no success. The phone # I have is still an active # but don't have an answering service. I'm not sure why they're not taking my calls.I try at different times of the day thinking they're busy-no one under God's green earth is that busy! I am very disappointed in their service and especially to know that my warranty is soon to expire-maybe that in itself has something to do w/them snubbing me.