"MICROSOFT*ULTIMATE, 1 M , READING GB"

Hi Rhys, sorry to know that.
Sincerely in these situations the best option is dispute the charge with your bank and ask them for a refund.

Because it seems that someone is using your payment information without your knowledge/authorization

To avoid this situation again, I can advice you to ask them to give you a new card and delete/block the current one

Or you can ask them to block all the incoming charges from Microsoft

Many thanks - I will do that

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this Rhys

This charge appears when you have an Game Pass Ultimate subscription active in your account.
Let's try to find the account used to purchase this subscription
For this please go to your Microsoft account order history
https://account.microsoft.com/billing/orders

Are you able to see transactions related to game pass ultimate?

If you have more than one email please check the order history with each one

Hi Josef - nothing there unfortunately

You're welcome

Hope they can solve the problem as soon as possible for you