Hello Brian,
I will help you with the necessary information.
You have an active subscription of AVG AntiVirus valid till 2018.9.5.
This product is not enrolled in to automatic renewal and will not be charged by AVG.
Please share the screenshot http://avgclick.me/getscreenshot of the email you received to assist further.
So about a year ago I unsubscribed (through both this forum via a a support rep as well as customer service)… but now I receive an E-mail at an address that's not associated with this account that I'll be charged 73.99 automatically for renewal… My next subscription period does NOT start in august… who exactly do I need to contact?
Brian, thanks for the screenshot.
From the screenshot, I could see that you do have an other account with AVG under the gmail domain. That's the reason you got the email notification. The Automatic renewal for this product has been canceled and you will not be charged in the future. In case if you get charged by AVG, please do let us know to help you with the refund.