Ivan,
I deleted your post. We don't like links to shops, if not relevant for the question; this mostly is spam and SEO.
To answer your question about reliable vendors in the European Union for replacement batteries for Canon camera's I suggest the first shop to try is the shop where you bought the camera (assuming that has proven to be reliable). Or some local camera shop in the town where you live, if online isn't a requirement (and you don't say it is).
Kees

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