7-Eleven review: posted sign, clerk would not honor the price

There was a large sign out in front of the store "Medium Slurpee or Small Coffee $1" with a picture of a medium slurpee and a small cup of coffee with steam coming up from it. The same sign was posted again inside the store, pasted right on the Slurpee machine with a picture of a blue drink container showing what a "Medium" Slurpee was. So I got one and the clerk wants to charge me $1.75 for it. I asked him what about all the signs advertising it for $1? In a very thickly accented reply he just says "No. $1.75. He confirmed it" (when my friend asked him what size was a "medium slurpee" then asked him about the price and the clerk just said "No." It was such an obvious display, I wanted what was advertised and was told I couldn't have it. So I told him he could drink it, left it on the counter and paid for my friend's drink which was $.79, paid for it with $1 bill. The guy at the cash register with his turban didn't even give change. It's outrageous there were signs posted both on the outside of the store in front (I estimate the sign was about 3 1/2 ft tall by more than 2') and also on the inside where the Slurpees were and they guy refused to honor it. My name is Susan Stambaugh and I frequent 7-11 all the time, but closer to where I live in Burbank. My e-mail is [protected]@gmail.com. I sure didnt' need the stress and problems this created for me.