This company was going to send me on an assignment...

This company was going to send me on an assignment in mt pleasant but in the process of driving there after getting gas, they tried to call me...
I was in a car driving to get to them for more information and didn't answer my phone (I never pick up my cellphone while I'm driving) and I told them why..
They fired me anyway saying I was unreliable.
My suggestion is not to apply at this agency very unprofessional as far as safetywise..