My no.1 rules in matters like this is, dont trust anyone who will come to your Dm offering to render you such services. DYOR before choosing any service by checking if they are legal or have any legal partnership with a reliable exchange.
Trust will get you killed in this kind of situation you have to mind the information you give out as the information you give out to the wrong person can be used to steal from you in the process of a scammer trying to help you, doing your own personal research is advised to avoid falling into wrong hands. If you get personal a messages from someone offering you help in this regard before accepting to explain yourself to the person be sure to have done a good background check about the geniuness of the person and whatever you do should be documented so that if there are issues along the line in the business you can pursue a legal case to get back your money if you had already paid for the services.
No one is to be trusted in the digital space not when scam is becoming a norm and I’ve read some comments where people were advised to stay very careful while dealing with cases like because so they don’t end up getting scammed more while trying to recover their losses and i am curious to know the mode of payment for these service because personally i will not be comfortable paying for a service im not certain will be able to truly recover my wallet and i think for them to gain the needed trust, then payment should only be from the recover funds and i think they said a 20% fee is what they charge, then it should be from the funds they will recover else scammer will steal the show from them and make their work even more difficult for them.