My credit card expired and I received an email from Adobe informing that I must updade my payment method.
Although I have a student subscription and I pay 19.99 euros monthly, the amount that Adobe claims that I owe is 30,74 euros.
Adobe didn't sent any invoice with details. So although I will be paying with a slight delay of a few days I don't understand how they can charge me 10 euros more. Also I don't know if is just for 1 month or if due to the renovation of the subscription that bigger amount will be charged from now on every month.