You have already made a mistake and your money seems to have gone, don'take more nasty behavior that could add to your incidence by trusting in any third service providers that promise recovery of your funds, there's no how they can do that, they are just looking for means for an extortion through such medium, because you will pay them for the service they will achieve nothing on, so why wasting your time, about what you saw online concerning trust pilot and the likes of o line reviews, they can manipulate all, transactions are irreversible, and lost funds are irrecoverable.
Funds are very much recoverable, banks have a very strong database that can trace information back even possibly to their origin. Their unwillingness to help you is a testimony of your public standing. Convince me that if OP is very wealthy and an important client of them and got scammed, that they will not swing into action and help recover the funds so as to be in his good books.
Were the same FBI not the ones that tracked down CZ of Binance and his activities against regulation?. They did so because of their interests.
Some exchanges that were hacked previously, whom have records of funds recovery, various authorities and organizations cooperated with their recovery team and got back their funds. A little example is Hushpuppi who scammed a quatri businessman of millions of dollars, he was tracked by FBI and wired funds recovered.
I believe the reason why they are reluctant to trouble themselves with assisting OP is simply because they're not getting anything in return and Op is just a commoner.