Stopped for gas. The pump wasnt taking my card, the only time on this trip that a pump didnt take it. So I went inside and no one was at the counter. I said in a fairly loud voice, Hello! Not to be rude but just to let employees know a customer was actually there. Youd think the station would want someone at the counter in case someone came in.After a few moments, I was about to knock on the counter when someone arrived from a back room and rudely told me to stop yelling in a louder voice than mine. I wasnt yelling, just trying to get someones attention. I ignored the comment since I just wanted to get some gas and leave. I couldnt fill it up since you had to give a specific amount, so Shell and this station got less of my money than they could have.