I was on flight *** PHL-LAX **:** - *:** seat E** locator code BQQCBG. My flight was de...

I was on flight *** PHL-LAX **:** - *:** seat E** locator code BQQCBG. My flight was delayed *hrs for unknown reasons. The delay is not my issue. My seat was two rows from the galley, I was in need of water and pushed the call button the blue light came on the bell sounded and I waited, I could hear the flight attendants talking, after some time I pushed the call button again and waited, then again and again after reasonable wait times. What was I suppose to do at this point, so I just keep pushing the button, final an annoyed attendant came out scolding me for pushing the button, I tried to tell her I was parched and needed water, she ignored what I said and replyed something to the effect that they were not allowed to leave the galley turned the light off and left. We were not in any turbulence the and no announcement from the pilot. A few minutes later a different attendant was walking back to the galley I caught his attention and was able to get some water. The attendant that was rude was later walking up and down the aisle selling new credit card accounts. Upon leaving the aircraft I asked one of the front galley attendants what the blue button was for, he responded to get service. SERVICE. After sitting for over *hrs in a middle seat in the most uncomfortably part of an airplane all I wanted was some water from an attendant who's job is to provide service.