You stating cryptocurrencies, can you be more specific on which.
And more information Would help in making things easier to offer assistance.
Like how was your wallet accessed
How secure was your seedphrase?
I think metamask deals with Ethereum blockchain mostly, you can use etherscan to check where the ETH were transferred to.
One of the most overlooked part of any business is the customer care.
No matter how good the product is,il if the customer service is poor then it's nothing.
Make a post on their X account maybe it would bring some attention to your plight.
Edit
Metamask updated their support yesterday on attending to scams
https://support.metamask.io/privacy-and-security/how-to-report-a-scam/
Get in touch with MetaMask Support to notify us of details such as:
The suspected scammer's public address
The website, email or other medium through which the scam reached you.
Report the scammer's public address on the block explorer, if possible. On Etherscan, for example, you can do this here. If the block explorer concludes, after investigation, that the address shows signs of fraudulent activity, it will be flagged. This will help other network users to exercise caution in future.
Alert the local cybercrime authority. Although we can't maintain an exhaustive list, we've detailed a few below which will cover much of our user base:
United States: the FBI's IC3 service
European Union: Europol portal (redirects to your chosen country)
United Kingdom: Action Fraud
Philippines: CICC form
Brazil: This varies depending on state. You will likely have to contact your state's specialized cyber crime unit, potentially in person.
Indonesia: Directorate of Cyber Crime (Patroli Siber)
Remember: as transactions on the blockchain are irreversible, MetaMask cannot retrieve your funds for you. Even if this were not the case, we wouldn't be able to anyway: as a self-custodial wallet, we do not have access to or control over your Secret Recovery Phrase — only you do. This means you're the only one who can manage the funds in your wallet.
In a nutshell they are not responsible since you in control of your seedphrase but gave recommendations.