LabCorp review: Service and unethical behavior

I went to a lab core to do a drug analysis for employment I signed in via the portal on the computer that was available in the lobby. I feel I was discriminated against in service by a African American lady. The location was 333 W Thomas Rd. Phoenix AZ
This is not the first time that this specific individual has treated me like this and every time I go there it seems she makes some unethical decisions in regards to doing my testing whether it's pushing me back in line for no reason or disregarding her position and doing her job