LabCorp review: regarding their rude staff!

Today I went for my Lab work. As soon as I entered it seemed like I entered in a Bar because I heard the staff was singing songs similar like Opera concert singing, atmosphere very unprofessional. When she saw me, she asked did you checked-in on that machine, I said "No" I don't know how to do it, She was African American.. She said it has instructions, then I was getting problem to do as it was first time for me, so I asked her and she came like an Obligation and then rudely telling me how to do it.
Please do the needful as it brings bad name for Labcorp.
Thanks!