Hello there @tristan90
Thank you so much for your first post to our Community Forums, it's really lovely to have you here!
I'm so sorry your struggling with BT Sports extra and your TV Go app. Unfortunately there is not a way to access this via TV Go, there way be a way to access is via the BT sports app but as it has already been mentioned by our community, as a Virgin forum we have no information regarding this.
Thank you again and I'm so sorry again I couldn't offer more advice.