I’m trying to cancel auto-renewal for an old computer that last renewed in October. I don’t remember which method was used to purchase Avast, and the email account on the order is no longer active. So, I created an Avast account and then logged into it from the old computer. The old computer now appears as a “device” on my account, running Avast Internet Security, but there is nothing under “licenses” even though my old computer says the subscription is active through October 2017. Please advise
Hi temcderm, welcome to the forum 
Please submit a Ticket, and provide as many details as you can https://support.avast.com/support/tickets/new?form=2
Than post your Ticket ID here, so we can ask attention for it.
Greetz, Red.