Log in to PayPal.com, then go to Settings → Payments → Subscriptions and saved businesses (also shown as Automatic Payments). Select Pulsed Media and cancel it there. PayPal's older menus called this section "Preapproved payments".
Cancelling your Pulsed Media service does not stop this PayPal payment on its own — the recurring agreement lives on PayPal's side and only you can cancel it there.
No PayPal account? If you paid by card through PayPal's guest checkout you won't have a PayPal login to use — open a support ticket and we'll cancel it on our end.
