Took my baby & dissapeared

Yesterday, Nicolene who was helping with a birthday we attended offered to hold my baby while I was eating then dissapeared with my 6 month old. I couldn't find my baby anywhere and eventually found her outside of play area in the restaurant. We were sitting in the indoor party venue so she had no right to walk out with my baby without telling me. She laughed when I took my baby. I am so distraught and upset over this. How can she think this is acceptable. I feel so unsafe in that place and find it extremely disturbing thinking that my baby could've been kidnapped. Who knows if she was even working with someone! Surely staff is trained not to do such a thing!!!