i failed bac test. I was not on duty or even near a commercial vehicle now it is a mark on my cdl n hard to find a good driving job how can i fight this

even though,all i did was went out to see someone in payroll dept. before they left someone who didn't like me called safety n i was told to take the bac test n failed.

later to find out the company was going out of business due to financial problems. also the asst. safety told me i should have got a lawyer because that was unfair. so what can i do now?