Hello kathryn smith,
I’m glad the sound issue was fixed.
You do not need to find the support person or receive separate confirmation. Once the Quick Assist session was closed, the connection ended. A new connection would require a new Quick Assist code and your permission, so the support person cannot access the PC now.
Please note that our forum is a public platform, and we will modify your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.