can any one solve my puzzle?

it's probably from a multipack, and the barcode would have been on the outer packaging/wrapping.
the barcode is for marketing purposes, primarily pricing and stock control, re-ordering.
the label on the actual bottle is required information under food safety laws, and quantity marking/ trading standards.

Lemonadington Spa? ?

I don't think anyone can determine where you bought a bottle of Sprite - itself all over the place.

Wondering why it's important... ?

Strange

not that, that's much help lol

if theres no bar code it has come from a Multipack.

The bar code wouldn’t tell you where you bought it from.

It is stocked in most supermarkets. Why do you need to know which shop?