How to secure nodes and future token rewards when metamask wallet has been hacked?

Please can somebody help. mY Metamask wallet has been hacked after my secret phrase was given in a community chat room. My funds have been cleared out but I want help in protecting my staked nodes and future rewards attached to the compromised wallet.
I have set up a new wallet already. In summary how can I protect my nodes and prevent future rewards able to claim from also being stolen?