Since there are absolutely no Shakta groups or teachers in my country, I try to take all opportunities to get in touch with Kali/Durga worshippers and sadhakas from all over the world so I can learn from them. That's the reason I'm here.
Vaguely in your neck of the woods, there's a guru called Mohanji who I think is pretty legit (not that you can really differentiate based on just websites, all seem similar, but I've met him) who spends a lot of time in Serbia, Croatia, Montenegro etc places. Might be interesting.