Keep my ticket open

My booking now says Economy (G) it was booked and paid for as UCS. Which is it? Was lhr -jfk-mco and return mco-bos-lhr.

I understood (G) to be upper not economy so a little confused now. I don’t do economy lol

All of my open tickets have been set to Economy (Y class). Don't worry, you've not been downgraded, it's just a placeholder until you rebook