Cancelled subscription, not charged, but subscription still going

See if the timing of what you did fits in with what's outlined in this document:

How to cancel a subscription from Apple - Apple Support

I would have to look up the details of Crunchyroll to see its terms. It seems to me you had it on trial, and you canceled it within the time window for no charges. Now it has expired and has completely ended and you haven't had to pay anything. I am not clear as to what the issue is here other than Crunchyroll should probably have cut off your access to the service before the trial expired. You got two weeks of use for free.

If you still have problems then maybe it would be best if you explain this to Apple:

Click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232