Hi, I just bought a License yesterday, an e-mail was sent to mi registered account and the instructions indicated that “that e-mail” had attached the license file that I would required once I downloaded the installation program. Well, It wasn’t there.
I have try to reach anyone on the phone number indicated but it is always bussy and I am not available to install my anti-virus yet!!
Please help me!!!
You could try this: http://www.avast.com/resend-license-paid.php 
Edit>As far as I know, you should receive your license ‘regardless’ of whether Avast is installed or not.
and I am not available to install my anti-virus yet!!
you can install in trail mode.... and insert license when you get it
Soporte Técnico y Comercial de avast! http://www.avast.com/es-mx/faq.php / http://www.avast.com/en-eu/faq.php
video http://www.avast.com/en-eu/faq.php?q=video#searchForm