Price changed from 29.90 e to 49.90 e at the moment of purchace
I purchaced freedome from f-secure.com. There was a discount for the price 29.90 e. During the whole purchacing process (entering name, credit card details etc.) the price was show as 29.90, but just when clicking Purchase Now, the price bumped up to 49.90 e on the page, and the purchase was made with this higher price.
See screenshot of this: https://imgur.com/a/KBH5kS5
How / to whom can I make and complaint about this, and either get 20 e back, or all money back and cancel the description?