DavidR
8
Try the following: https://support.avast.com/support/tickets/new. Click the ‘I need help with an existing order.’
from the next window, enter as much information as you can - your name, date of purchase, item purchased, how purchased, PayPal, etc. etc. As much information as you can and the fact that you used an incorrect email (a stab at what that email address might have been) and your correct email address.