is there a live chat or email address for Avast that I can use
First, I’m an Avast user and not an Avast Team member.
For what problem are you trying to contact Avast - there is no direct link you have to go through the support(.)avast(.)com site.
You could try this Contact Avast - Contact Avast Support - Avast Phone Number, and Chat Support
But it rather depends on the reason you need to contact them.