Thanks for contacting us. My name is Angelyn, your dedicated iTunes Store Advisor.
I understand that you want to cancel your subscription renewal with “Smule”. I know how important it is to keep our accounts from unwanted charges. Don’t worry, I will do my best to provide immediate resolution.
I've reviewed your case and took this into careful consideration. As a result, I’m glad to inform you that I have successfully cancelled your subscription and I have issued a full refund for the recent subscription renewals as well.
Within ten business days, 5.98 USD should be posted to the payment method used to make the purchase.
For future reference, here’s a useful article that will help you manage your subscriptions, including how to disable the auto-renewal feature:
View, change, or cancel your subscriptions
http://support.apple.com/en-us/HT202039
I hope this helps. I’m looking forward that you continue to enjoy the iTunes Store!
If you have further questions regarding this concern, please let me know, I’ll be glad to assist.