We were doing Webinar in the office and we used ' ' and all the noise was heard in the background.

We selected in your APP the Microphone that we were using in ZOOM. But it didn't isolate background noise.

Then on another occasion when doing a ZOOM and using an external Microphone 'Blue Yety', the double audio of the Computer and the Microphone was recorded. And what do we do there?

What could have gone wrong? We have done it as explained in their tutorials.
Well, it's not that it's complicated either.
But hey, they didn't work for us.
What can you tell us to fix it because otherwise we do a REFUND.

Thank you!