I am unable to cancel my sandbox subscription:
"Your request is temporarily unable to be processed".
The monthly subscription is renewing on a daily basis, which is odd because typically it is faster.
Here is a possible clue: When I did the in app purchase, typically, I get a second confirmation box saying "You're all set". However, this last time I did not. I then tried to subscribe again, and it said I was already subscribed.
I then went to my database, and noticed that the purchase ID was different than the one I can obtain from the store API.
It's been days and the subscription just keeps renewing. I tried to cancel in app, and online (the subscription shows, but cancel button does nothing online either).
At this point, I can no longer test subscriptions.