Refund

Hi I recently accidentally subscribed to this app and did not mean to. I did not know I was subscribed nor how much it was. I can't afford to pay 50 dollars and I want a refund. I did not use the app while subscribed and didn't use any music from the app since I didn't know I was subscribed. Please give me a refund.
I'm hoping I get a refund since some of these comments are saying they didn't get a refund or they weren't contacted back.