I work on the till at a supermarket, and yesterday my manager came to me and said a woman had complained to him that I was snappy with her. I had a think, and I think I know what happened. A woman came up to the till and put her items down. They were a little out of reach, so I asked her to please push them towards me. She didn't hear, or at least didn't respond, so I asked her again. She again didn't hear, so I repeated myself again, a little louder. This time she did catch that I'd said something, and asked me to repeat myself. So for the fourth time I asked her. By this time I was quite loud, and speaking quite sharply, trying to enunciate as clearly as possible. She heard me, and obliged.
So it's quite probable that by the time she heard me, I did sound quite snappy. My manager understood this and was satisfied. But I don't like that she thought I was rude, but I can't think of a better way to handle it, short of tapping her on her shoulder to get her attention. Any thoughts?