To cancel your YouTube TV subscription, log in to your account on the YouTube TV website or app. + 1- 855-740-9747 Click on your profile....
https://community.qualtrics.com/discussions-about-xm-community-5/official-atupgrades-how-to-cancel-youtube-tv-subscription-29543

Firstly, log into your account on the Sling TV app or website +1- 855-740-9747 to cancel your subscription. In the upper right corner, click on....
https://portal.mtaq.com.au/forums/general-discussion/75af12b2-2c85-ef11-9443-000d3acaa853