Channel points redeemed but no audio

So you building an extension or usings someone elses extension?

if someone elses extension you will need to ask the developer of that extension for support/assistance

Sounds like you are using someone elses extension, it should provide control options to manage what rewards the extensions offer.

You can also go to your points dashboard to remove the channel points rewards. But the extension may readd those rewards as it’s expecting to use them as configured.