Coke - still not good!

There is something wrong with Coca-Cola! I had a previous bad experience with the 300ml glass bottled cokes. They did not taste right. Today, I purchased another 10 of these drinks, only to find that they still do not taste right. I have compared the taste with other cokes that I purchase almost daily, so it is not my imagination!

I want a refund but the shop refuses to give me one where I purchased them!