Family Dollar complaint: Non- Rehirable Issue

Hello,
I would like to file an official complaint to Family Dollar corporate on behalf of the fact that I believe that I was strongly mistreated by my former boss, at the Jasper, Georgia store in late 2013. I have been trying to work for Family Dollar and Dollar Tree the last couple of years, and she had put me down as Non-Rehirable from ALL stores right after I left the company in 2013.
I am a very hard worker, reliable, and dedicated. I have had numerous retail positions since 2010. Former co-workers and supervisors can attest to the fact that I am a great employee.
I will describe in detail my experience with this store. I was an Assistant Manager at the Jasper, Georgia store, working overtime most days, sometimes up to 60 hours a week. At times, I would be alone in the store and would have to call Ms. and ask her to come in. Some days she would not come in…even though she was scheduled to. The holidays became very hectic for me and the cashiers…and we were quickly overwhelmed. I became so stressed out one day when she literally berated me for not finishing the truck, even though the store was very busy that day and I had no time to stock shelves. She was scheduled to work that weekend, but called out. She had repeatedly called out of work since I was promoted in July 2013. I made the decision, after discussion with co-workers and family, to quit. Her lack of work, the mistreatment, and the constant rudeness became too much.
I found out later on, within a year of my quitting Family Dollar, that she was fired for stealing from the company.
How do I change the status of my being Non-Rehirable, and do this without going to court or implicating her in any way? I hold no ill will towards her, but I think it is wrong and unjustifiable that I can not work for the company. I have been unemployed since March 2020 because of the Coronavirus. I am on unemployment, but I am afraid that after the first of the year I won’t have a reliable source of income. It has become a struggle to find a job and the store manager at the Clayton, Georgia store says that there is nothing she can do about my status. Otherwise, she would hire me, because they are in need of help.
Please help me resolve this issue.
All the best,
Natalie Holt