Xbox game Pass ultimate subscription?

Hi, I got the Xbox game pass ultimate and paid for it on my Xbox. Now there's not enough credit left and I receive emails that the subscription could not be extended and payment is due. Are debts building up now? Can I cancel the subscription? If yes how? Do I have to respond to these emails in any way? And if I top up my credit, will this subscription be automatically activated again? I don't want that.

If you have no PayPal and Co. Coupled, you will not get any debts and can no longer use the abbo because it has expired. If you want to cancel it: register on xbox.com and go to Manage Account, then Payment Methods and Subscriptions or something honest, then you will see your current subscriptions and can click one, then go to Cancel.