Need Help Canceling my iTunes Monthly Charges

Can someone please help me cancel my iTunes monthly subscription (looking for a link or telephone number I can call)? I didn't even know I was signed up and just realized that my account has been billed $72.96 from 2015-2016 (couple random, more expensive charges/payments in 2015 and all of the sudden I was billed/paid $9.99 for June and July). I'm feeling frustrated that Apple is making it so difficult to cancel... and to be REFUNDED!

Help!

CKE22