Prezi Charged Me $57.60 Despite Cancelling Free Trial

I signed up for Prezi’s free trial, providing my credit card details as required. However, I made sure to cancel my subscription before the billing date, expecting that no charge would be made.

Despite my cancellation, Prezi still charged me $57.60 without my authorization. This is completely unfair and misleading. If I canceled before the deadline, why was my card still charged?

I demand an immediate refund and expect Prezi to fix this issue to prevent it from happening to others. Prezi, process my refund now and stop charging users after cancellation! Please resolve this issue as soon as possible!