Hi, today, i accidentally clicked "Free trial" on spotify, so now, I'm hooked up with premium for 7 days. I'm afraid I will get charged after the 7 day trial has ended, even though I haven't entered in credit card details. Is it still possible i will receive a bill or something? And how do i cancel the trail after 7 days so i dont get charged? I also received a 30 day trial add-on notice from spotify. What's that about?!!?