Spotify runs about $10.99/mo. Here's the direct link and exact steps to cancel it.
Step by step
Log in to your account
Go to Your Plan
Click Change Plan
Select Cancel Premium
Cancelled it — or keeping it a little longer?
Either way, ForesIQ warns you a few days before Spotify — or anything else — renews, so you decide on purpose instead of finding out after you're charged. No bank login, no card required.