Most staff who work here are very nice and helpful...

Most staff who work here are very nice and helpful but there are a couple of women who are so rude. I say thanks/bye, they act angry and literally say nothing. This has happened a couple of times for no reason whatsoever. I often get the feeling I must have murdered their dog or something. Once, I had a return parcel and said "I have a parcel here" and after clarifying "oh sorry it's a return", the staff member is angry with me and goes "well, you didn't say that did you". Proceeds to give me the angry silent treatment when I say thanks and bye.

Maybe they need to work on their mental health here. I have worked in customer service myself and I know it can be stressful, but not every customer is an enemy!