Music Apple

Hello, Apple! I'mm writing you to complain about services you provide with Apple Music. I have the monthly subcription (costs 4.99$). Previous month, Apple Music charged automatically two times (once early in the month and then in one week again). This month, I was charged, but I didn't get any music. I only get messages that I should pay and I have no enough money on my debit card. What's wrong? Why should I pay 2-3 times in one month? Waiting from you an answer asap!