edit: Quick update. Based on all of the questioning, I'm not sure I addressed this part properly at a time, so I will now. When my account was "freeze lock", even though it was fully KYC verified, they have requested from me to do another KYC verification, via e-mail:
https://talkimg.com/images/2025/05/24/UaiZgH.png
and my response:
https://talkimg.com/images/2025/05/24/UaiQFI.png
error message from SumSub (sorry for being black/white, took it from demand letter as I need to go through my e-mails to find it, will update once I find original image):
https://talkimg.com/images/2025/05/24/UaitnP.png
Reason why I'm posting this is because if they claim that I attempted to verify any of conflicted accounts, I did not intentionally, but was asked to do so via mail and could possibly be that the support agent provided me with someone else's KYC link and that Sumsub link they provided wasn't for any of my accounts.
If this was the case, I guess everything that happened is because someone within their team was overwhelmed and actually made a mistake? This thing never crossed my mind up until few minutes ago

Now that I think about it, why would they ask me to verify my account if it was already verified?
Even wording
Once your account status is successfully verified, we will be able to assist you further.
alludes that my account was not verified in first place, even though it was

Sorry, but more that I read this e-mail, I'm now confident that this is either mistake by their end or intentional screw up with me to avoid paying, especially since it was not requested via dashboard, but via e-mail, delivered by a representative. Lets see what will be their response...