Unable to cancel AppleCare+ with Theft and Loss before renewal

I bought my iPhone last year with AppleCare+ with Theft and Loss in the US, and the plan is now coming up for renewal.

In Settings, I can see a message saying that I have not finished setting up AppleCare+. When I tap Finish Setup, it just opens an empty subscription window with nothing I can manage or cancel.

At the same time, I’ve received an email from Apple confirming that the AppleCare+ plan is going to renew, so it clearly appears to be active.

The problem is that I cannot find any way to cancel it. It doesn’t appear as a manageable subscription in Settings, and I can’t find anywhere on the Apple website to cancel it either.

I’m currently in Portugal, and the support phone option I can find is only in Portuguese, which makes resolving this by phone impossible.

Has anyone had the same issue? Is there another way to access and cancel an AppleCare+ with Theft and Loss plan before it renews?

Thanks!