How can I cancel a subscription for support that is not listed in my IPad subscriptions

I can’t cancel a subscription that is not listed in my current subscriptions. I am being charged a monthly fee of $3.73 for Apple Support that was free for one year with my purchase of my new iPad. I have been paying for it for several months now, but when I go to my subscriptions it is not listed. I tried calling Apple Support but could not get past the recording.