Log in to you account via Wickie app.
Click "Explore" and then "Profile".
Find the "Contact Information" section.
Click "+" sign to add a new email.
Enter your new email address (*email*)
Confirm the change with the verification code sent to your phone.
Click "Save".
Set the new email address as the default address.
After the successful change, you can log in to your account with *email* and will be contacted at this address.