Family Dollar complaint: Customer Service Representative

My name is Jessica Diaz, I recently got terminated from work after going to the emergency room and being home sick for a week. I called the manager when I got better and she took me off the schedule for the following week with no explanation. Going on my third week off she calls me(Rose) ,the manager, and tells me I been terminated for reducing a price on a item that was open and damaged. She said that I will not be able to work for any family dollar or dollar tree ever again. I loved my job even though she over worked us and honestly I feel like she fired me for being sick and missing work. There’s employees that have missed work for no reason, employees that being short 100 dollars on there register and employees that use family dollars t-shirts for work and put them back on the hangars and Rose never even gave them a verbal warning. Is there anything I can do and if so can someone please help.