u/PurpleBellaButerfly

How do I get this off of my record? I currently have a DNR status at a hospital that I want to return to as a traveler. I’ve been away from that hospital for over a year. I accepted a contract last week and then was told this week the hospital rescinded because of DNR. Apparently I had some negative feedback from a manager that said I had a bad attendance. I called off from work 5 times during a 13 week contract. 2 days from being ill with the flu and the others were because of bad weather (snow storms).
What can I do the clear my name/record?