I want to unsubscribe

[joha959]

I have tried to unsubscribe via customer support, problem is the e-mail address used when I purchased is not longer valid.
I can not come around this problem because support ask me to verify my no longer valid e-mail address trying to send their
mail to it Please help!

[DavidR]

You could first try changing the associated email address, I don't know if this would also require validation.

Sales change order details wrong email address given, etc. - Submit a support ticket https://support.avast.com/en-ww/contact/sales in your case select the Billing, payment, or license issues option - and then the I have a different billing or license issue and click Next and select your preferred communication method.

[joha959]

Thank you very much, your answer helped me solve the problem 

[DavidR]

You're welcome, thanks for taking the time to let us know it is resolved.