Have you tried reaching out to their customer support with a detailed explanation of your situation? Sometimes, a thorough, well-documented appeal can move things along. Also, you might want to check if there are any community threads or posts on similar experiences with HitBTC where others have shared successful strategies or workarounds.
Unfortunately for OP, this won't work when it comes to HitBTC. There have been past cases of victims fulfilling their KYC verification requirements only for HitBTC to shift goal posts so that some victims can give up after some time.
It might also be beneficial to look into legal advice or assistance from crypto-focused legal services if you haven't recovered your access soon. There's a community spirit in crypto, and many have faced similar issues, so sharing your experience here could also help others be cautious.
What will legal services help you with if the terms of service state that one must pass KYC verification for the exchange in question.