How the heck do I cancel Avast anti-virus autorenew?

[Ron Obvious]

My wife got suckered into a subscription for Avast while staying at a hotel a few months ago. By default, it keeps auto-renewing even though she's not using it. Trying to turn off auto-renew, you enter purchasing info, press "manage account", and sure enough, there's an on/off radio button for auto-renew. Clicking on "Off", you get an "Are you sure?" window in which you can't actually select anything. Here's the thing: every time you select "Off", you get that window WITH NO WAY OF ACTUALLY SELECTING "OFF"!

This strikes me as straightforward consumer fraud, but, short of telling our bank to cancel the payment, how do I actually turn off auto-renew?

Google is no help. The first x returns all point to avast, and then there's a youtube video in which somebody simply selects Off and everything works. Well, I can't seem to manage it.

Hints? Thanks in advance.

[lpbk2713]

1. Do you use NoScript or GreaseMonkey?

Or maybe your firewall is preventing you. Use another browser if you have one.
Or you might have to make corrections in each of the foregoing if you don't.

[left-of-center2012]

2. If you're paying for it ...

Call your bank or credit card and they'll stop the payment.

If it's more of a software thingy, try these free things (I've used them for years):

Revo Uninstaller

adwcleaner

(free edition) Malwarebytes

[Egnever]

3. Try here

There are different places to cancel depending on where you bought it from.

https://support.avast.com/en-us/article/Cancel-Digital-River-auto-renewal