Nami Wallet Hacked Stolen Funds - Help Recover Funds and Stop Hacker Solution

I just got hacked via Nami wallet and ledger. All my ADA and SHEN are gone within a second. Unbelievable how unsecure NAMI wallet is. I lost a fortune, all my savings in ADA and SHEN of the last 2 years. They first took my SHEN and then my ADA. I dont know what I can do. I reported it to ledger support. What can you suggest? I have the transaction hash but dont know if it helps.

There should be a time implemented to get trx back, eg a few minutes. And a value limit per transaction as a secure setting by users like on every bank account.