Minecraft Bedrock Realms Subscription not appearing in Microsoft Subscriptions page.

I wanted to upgrade my Minecraft Bedrock Realm as more of my friends were wanting to play at the same time.

I encountered the issue of not being able to access the subscription details.

After a back and forth with the Minecraft help service, we were unable to find a way of resolving it from their end, stating:

"Minecraft Player Care can assist with technical issues related to playing Minecraft. The Microsoft support team is best equipped to help with issues related to signing into your Microsoft account or purchases made using your Microsoft account. "

During the process, I learnt that in order to upgrade my Realm subscription, I first had to cancel my current subscription. Unfortunately, due to inability to access my subscription details. The Realm itself still functions and we use it near daily, and the payments have never failed to be taken from my account. They are taken with the reference "MICROSOFT*REALMS 1".

Please can someone help me with this? I don't want to fully cancel my Realm, I just want to upgrade it and to be able to actually access the subscription information and settings, and not just the world information and settings.

Thank you.

Aside:

Why is the Tag system so terrible? There are no relevant tags for this issue. It is a subscriptions issue, the closest option is Windows for home:Windows11:gaming. But it's not technically a Windows issue. It's a Microsoft one.