99.9999% of these "We can recovery your funds" sites are nothing but recovery room scams.
The simple fact is that you have 3 primary possibilities to recovery money lost to scammers:
1. Credit card chargebacks - if you used a credit/debit card, you may be able to chargeback. It's hit or miss.
2. A lawyer - if the scammer/scam company can be identified and is in a country that follows laws, at least some of the time. Of course, you need to make sure there's a REAL lawyer involved before paying 1 cent. I've seen entire fake lawfirms have recovery room scam websites, so you need to make certain the lawyer/lawfirm is properly registered. Even then, some lawyers just collect a fee, send a demand letter, and then do nothing more.
3. Regulators/law enforcement.
If you say "but they NEVER do anything" please go find a hammer and use it to pound on your own kneecaps. Then realize that by acting like a helpless fool, you are hurting yourself and other people.
Regulators and law enforcement officers are not psychics. They need detailed complaints with evidence. Scammers love people who thinks reporting to the authorties is a "waste of time" because that lets them keep scamming.
Still don't believe me? Check out how well the Anti-Deception Coordination Centre (run by the Hong Kong Police) has been doing against fraud:
Hong Kong police intercept HK$6.3 billion scammed from victims of phone and internet swindles over three years