Unprofessional experience at Tira that left me feeling insecure

First time at Tira store today. I asked the employee to suggest a Tirtir shade for me. She applied it on my face and my sister just casually said that it looks a little dark and might oxidize further. Instead of handling it professionally, the employee replied with, “Do you think the concealer she’s wearing is correct for her? Then how can you say?” It made me feel little insecure and pissed me off I’ve already had a bad experience with online shopping and this happened in offline store lol