Don't use this cab service. I called on Wed. for a...

Don't use this cab service. I called on Wed. for a p.u. on Thursday at 4 p.m. to get to the airport. I also confirmed my reservations on Thursday morning. At 4:01 I picked up my cell phone to call and saw that they called and left a message. The message said the driver was stuck in traffic, but I needed to call back. I called back and the line was busy. I kept calling, about 15 times and it was always busy. In the meantime, my sister was calling other cabs. I finally got through and the girl informed me that they cancelled my reservations because I didn't answer my cell phone and didn't call back. I told her that I had tried many times to call and the line was always busy. She said they were aware of the phone problems and they still cancelled my ride. What??? She said they would send someone out again. Yellow cab got their first. Called Diamond back and cancelled. I do have to say that the girl making the reservations was very professional and apologetic as I was losing my cool. I won't call them again.