Apple iTunes charges

Im being charged daily for apple iTunes and I’d like to understand why. I’d also like to cancel it if I’m to be charged like this so often and I’d very much like my money refunded. $7.50 plus additional charges of $2.99 and I’m not even sure what it’s for. Perhaps I’ve made an error, but please return my money and explain why I’m being charged so often so I can avoid it in the future.