Money what is that ? - Avis employé Assistant Manager Rite Aid

When I was hired at Rite Aid I was hired as a supervisor. I made my way to 13.70 an hour. I was promoted to assistant and was paid salary. Something happened and they made all assistants hourly when I did they brought my pay to 12.39 per hour and made me work 5 hrs overtime per week to make up for me getting paid less. 3 years later I am finally making what I made as a supervisor. I have a family and it was really hard to support them with that pay. I had asked hr multiple times for a raise but nothing.