How do u even respond?

So umm I was at work and I had to get my lunch from the front desk. Two females were sitting there and I said excuse me cos I needed to get the lunch. She said excused. I got so pissed but didn’t say anything. These two women are older than me but I’m new and I’ve noticed that they are always looking at me with such a disgusting look as if I took their property. It really pisses me off the way they act n look at me. What do I do?
How do u even respond?
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