Can´t manage license. Prezi doesnt accept upgrade

Í tried 3 different credit cards and 2 different paypal accounts and my request doesn´t get approved. I want to upgrade and prezi doesnt let me do it. I need help but basic plan doesnt offer support. I called to the billing support and they hang off 3 times without talking to me. I´m in a limbo.

4 posts were merged into an existing topic: Error message during payment for upgrade