Hi @Tristan_S_Ping-ay, welcome to our Community Forum! If you set up your free trial without card details, the trial will simply expire at the end of the 30-day free period, with no charge.
If you set up the trial with card details, you must cancel it via the Admin Console if it’s an Organization plan, or via the Team Settings page if it’s a Team plan.
Our Support Team can also assist you with that!
Hope this helps!