Hi Tepapa,
Thanks for contacting us.
I understand that your "Sing! Karaoke by Smule” subscription isn’t functioning correctly. I know how important it is for you to have this investigated. I am happy to provide you the information that I have gathered to address your concern.
I’ve reviewed your account and found that we issued you a refund on 04/23/2016. The refund should be available within ten business days of when we processed it. If you still haven’t received your refund after ten days, let me know and I’ll investigate further.
I trust you find the information in this email helpful. Please feel free to reply to us if you have further concerns with the iTunes Store. Have a nice day!