Email address already in the system

Hello Ronaye,
Thank you for reaching out to us with your concerns. Upon checking your records, we could see that your AVG PC Tuneup got auto-renewed. In order to update your email address, we suggest you to get connected with our support team http://avgclick.me/AVGsales via online chat. Calls from outside the US, UK or AU may be subject to international charges from your telephone provider.
AVG Sales Support: United States: +1 844 259 8811 UK: +44 (0) 800 652 4940 Australia: +61 1800 429 319
Please feel free to contact us if you need any assistance. Thank you!

When I initially purchased AVG several years ago I had a comcast email address.  I changed my email to frontier, but got rid of that an am now back with the original comcast address.  I am trying to update my account but it won't let me put the old email address in because it's already in your system.  So I'm not receiving any of your emails and was just notified by my credit card company that you auto renewed me.
How can I change my email address back to the original please?

Hello Ronaye,
Thank you for reaching out to us with your concerns. Upon checking your records, we could see that your AVG PC Tuneup got auto-renewed. In order to update your email address, we suggest you to get connected with our support team http://avgclick.me/AVGsales via online chat. Calls from outside the US, UK or AU may be subject to international charges from your telephone provider.
AVG Sales Support: United States: +1 844 259 8811 UK: +44 (0) 800 652 4940 Australia: +61 1800 429 319
Please feel free to contact us if you need any assistance. Thank you!