South African Breweries
Leaking bottle

I bought Castle light in Durban, Travelled by train back to Pretoria
Kept it closed, in my bag, on my return home, I had some and when I wanted to open another I realized that it under the halfway mark. Checked the bottle if it was maybe cracked or opened.
Nothing was wrong with the bottle, seal still intact. It looks like it is however leaking by the seal of the bottle. Still have the bottle to show.
What should I do?

Company: South African Breweries
Country: South Africa
City: Pretoria

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