Sac N Pac Drive in Groceries

My name is Mike.   I bought a six pack of miller lite bottles this sunday, 7-15-11. I got home and opened one and it tasted fine. The next one I opened didn't taste right. I opened another one and noticed it did not have the swish sound like it had lost its vacuum. I opened another (4th one) and it did the same thing. I went to take the beer back and they would not take it back. I basically bought some bad beer and the store will not take it back. This is just crap! They say its the law. I looked it up and its up to the store. They are not out any money because its a vendor item, I kmow because I used to work in a grocery store. All I wanted was to try another six pack. I'm out 8 bucks now and I won't shop there anymore. It would be so easy to just exchange it and everyone would be happy. If I can, I will pass on the word about sac n pac stores. You are out of luck if happen to buy a bad product there!