You threw me with the 'free trial' thing, as we currently have a free Premium trial running.

If you have the free account, you won't ever get charged.

If you just want your free account deleted then use the online contact form and someone at Spotify wll do this.

If you have a free account (not a premium trial) then there is nothing to cancel.But before you make any decisions, there are a few things you need to know about deleting your Spotify account – primarily, that there is very little incentive to do so because of their “Forever Free” service. If you don’t, and you just want to delete your account, you’ll need to contact Spotify customer service directly. If you’re tired of Spotify, or are switching to an alternative to Spotify like Apple Music or Google Play Music, then you’ll need to cancel your subscription to Spotify if you pay for it. If you subscribed to the SHOWTIME streaming service on your Oculus Go or Oculus Quest, please refer. If you subscribed to the SHOWTIME streaming service on your PlayStation 4 and you wish to cancel, please refer to this page.

If you subscribed to the SHOWTIME streaming service on your Xbox One and you wish to cancel, please refer to this page. How Do You Cancel Free Trial On Spotify Subscription.How Do You Cancel Free Trial On Spotify By juskocharco1970 Follow | Public

How to cancel my spotify account