I have never used fiatex.pro before, but i just checked the website and it seems to be an automatic exchange that processes crypto to fiat transactions, at least that is what i understood when i went through the site. So if i am right, what did you intend to do here, deposit USDT from HTX into fiatex.pro and withdraw fiat from the exchange?
It has been 3 weeks. The funds are not credited and not returned.
HTX should have refunded your money back to you, but that's centralized exchanges for you, they try to use every opportunity to seize customers' funds and ask for verifications. I think you should make noise about this issue on other platforms, maybe that would force their hand to release your funds to you.