To upgrade to Level 3 and prevent SAUCE slashing, follow these steps:

1. Send ICE Coins: Transfer the required amount of ICE coins to the specified address for the Level 3 upgrade.
2. Provide Transaction ID: Submit the transaction ID within 15 minutes of the transfer to complete the upgrade process.
3. Complete Payment: If prompted, send any remaining amount needed to finish the payment.
4. Confirmation: Once the payment is confirmed and processed, you will be upgraded to Level 3, which turns off slashing and secures your SAUCE balance from inactivity penalties.