How to stop Apple charging me for things I'm not using?

I currently swapped my iPhone 6S for a Samsung S8 but before I sold the 6S I forgot to stop Apple from taking money from me for storage. Does anyone know how to do this without having am Apple product?

Log in to your Apple account on their web site.

You should be able to disconnect the phone prom your account and also manage any other services you have.

Web login here

You can log onto your Apple ID from iCloud on your PC

Cancel the Direct Debit with your bank.

Could contact Apple Support on Twitter about that.