Game Pass Ultimate refund

You don't need to refund it, as it has been converted to game pass ultimate, so you will have game pass ultimate for the period you just paid plus the period you paid for game pass for console

Since you purchased Game Pass Ultimate, the Xbox Game Pass would have been upgraded and the time would have added onto Game Pass Ultimate. So you wont be able to get a refund.

It seems to me that you bought the standard Game Pass instead of the Game Pass Ultimate, so you will need to request a refund with support so that it has enough to convert to Ultimate.

When you added the Ultimate, the PC Game Pass was cancelled and upgraded to Ultimate. So it was no longer eligible for a refund.

To request a refund go here xbox.com/refund. As for Game Pass. If you purchased Xbox Game Pass, then you would still need Game Pass Core or Xbox Game Pass Ultimate to play the game online, being as it is a multiplayer game.