Negative Upt Fired

I just realized I was fired for negative UPT I have more than enough PTO to cover it but I was unaware it was even negative for 2 weeks because my manager didn’t even say a peep, of course I should be responsible for my own time but if all I get in notifications “low upt” I assumed it was just under 10hrs even then he should tell me I didn’t showed up for 2 days last week cause my only form of transportation wouldn’t even start and I was left stranded after work and got a mechanic which lasted 2 days, I was planning on covering it with my PTO but I couldn’t even go in my A to Z today cause I was already fired. It hasn’t even been a week since that happened. Anyways do I have a chance to win the appeal due to the manger not even telling me shit for 3 straight weeks I had PTO to wipe it clean