"Your credit card has not been charged yet." - Yes, it has. Immediately

Hi All,

I had a PRO licence 2 years ago, and I wanted to create 1 prezi on Monday, but didn't want to buy a licence for 1 year again. 
So I clicked on Renewal and the site told me that "Your credit card has not been charged yet." and I will have 30 days trial period, when I can cancel anytime. 
I said hurray, how cool they are, they obviously made a lot of updates and I can try it again for 30 days.
But when I clicked OK they have charged my credit card immediately with $159. 

In addition, I received this e-mail on 30th June, after the renewal:

"This is a confirmation email for your Prezi account upgrade. Congrats, you now have a Prezi PRO license!

Your credit card has not been charged yet (yes, it has!). If you decide to continue with Prezi, we'll automatically charge your card in advance of your next one year subscription. If you cancel within the first 30 days, you will not be charged.

Your credit card (XXXX-XXXX-XXXX-5274) will be charged $159.0 on 2014/06/30 (so immediately)!!
This charge covers your PRO account until 2015/06/30."

I'm Hungarian, leading an innovative company and very proud of prezi.com as they also started in Hungary, but I don't like this way of business. I assume it was only a technical problem.

What should I do now?

Thanks 
Andras
HUNGARY