sorry over zealous and stressed out

Long story short transfered to third store after first two stores got closed down. Third store was alot farther than others car broke down. Time issues arose bcuz of public transportation schedules and a one way trip consisting of 2.5 hrs. Mgr wouldnt bend any on schedule and said if you cant commit to a full time schedule you should seriiuly think about coming back. I have proof in a sent email to district mgr that i spoke with him a week ago informing him of the situation and what was the outcome of the conversation he had with store mgr about my schedule change.NOTHING no reply.
Second to last day told boss cuz of bus scheduleing iam gonna be an hour late he said dont bother coming if you cant be here on time. And i couldnt find a personal ride to get me there on time. I thought i would ve been fired if i came in late so i didnt and called hr the next day to inform of situation.
Got appeal letter for volunteer quit how do i answer this. Specific codes to cite .