My job won’t rehire me again and I have apologized three times on the phone. They keep rejecting me.

The teacher I worked with said I wasn’t being firm enough, I let kids do what they want and it was my responsibility to take a student one on one to the bathroom two or three times a day. I do take her but the little girl would fight with me, run out and I had to chase her. I let her throw a fit and it took us 30 minutes to get back to class. Everyone in the meeting was talking about what a terrible job I was doing. Can’t believe they talked behind my back. I apologized but they don’t take “sorry” very well.I got fired in April because I was careless and I lied. One time a girl scratched another girls face bad. The assistant scolded at me that I needed to be on it and I just stood there and let it happened. That was before my loss. Another student got hurt by jumping off the table and hurt himself. We’ll she shouldn’t have got on the table. I got called out for letting him jump off the table and he got injured and lying about it. His injuries wasn’t that bad. The principal had a stern talk with me HARD and she revolt my contact and let me go. I told them I went through a loss but they said it’s understandable it’s difficult but lying about a child getting injured and not being close to the table is not tolerated and they fired me.
I told them I’ll do better next time but they refused. I apologized but they won’t accept it.