Wrong email, how to change it?

[REDACTED]

I requested the 30 day free trial version of avast, but I wrote the Email incorrectly.
I can't acces the licence mail and I can't find how to change the Email to get the licence, and prevent any future payment (since I had to write my card details to be able to get the trial).
.
Could anyone help me?

[Asyn]

Hi, see: https://www.avast.com/faq.php?article=AVKB24#idt_0410