Dollar Tree

I had worked for dollar tree for 9 years and have been a faithful employee l was a asst manager and was treated unfairly I worked on my days off I worked when we didn't have a store manager I even worked when I had a doctor's note and a sling on I was working 30 to 40 hours a week to 17 hours a week I had informed my store manager and the dm that I need to go home but nobody returned my calls and texts