My Employer Will Not Pay Me My Pto.

location: Nashville, TN

I'm still employed with the company, and I have been for the last eight years. I submitted a request off form in May for the last week of august, stating the dates that I would not be working and that I wanted to use my available PTO for these dates. My manager approved it. Then she got fired, and the roll of payroll was taken over by our regional manager. August came and went and I went on my vacation. When I got the paycheck for the pay period of my vacation, my PTO was not on there, it was just my wages from what I had actually worked that pay period, from the second week of the pay period. I asked my current standing manager (technically an assistant manager, this is not the person who handles payroll, just the person I directly report to) if anything could be done. She said she spoke to the regional manager and the regional manager said she would make sure that it was on the next paycheck, two weeks away from the original date that I was supposed to receive it. I spoke to my manager about the pto every single day for two weeks, asking her to please make sure to remind the regional manager that I needed my PTO on my paycheck. She assured me each time that it was handled. The day before the pay period ended, she disclosed to me that several other employees had also requested to use their paid time off and didn't receive it and that issue had to be rectified for them as well. Anyways, another paycheck has come and gone and I still have not received my PTO. Is there any form of legal action that I can take?