A website (that's not well documented) has taken my details (a password, and my email).

I've literally looked ALL OVER settings, and there is no delete account option. And, only after I signed up had I realized that is was a tad bit suspicious.

Its main language seems to be Russian, but is poorly translated to English (which may be excusable).
But I don't want them to have my account. I tried asking support, and tried asking the "community chat", which seems more like a bunch of bots (they just ignore me, and talk about random off topic shit).
And I don't want them to have my info, or the validation of my account anymore. Whenever I tried to address the issue with some alt accounts I made with a throwaway email address, I got banned multiple times, just recently, when (what/whom)ever was banning me realized it was no use, I was just ignored.

Any advice.

Thanks!
Cheers!