Upgrade subscription - Internet Security to Ultimate

Hello Keith,
Thank you for reaching AVG Support Community.
We're glad to point you in the right direction.
We request you to contact our AVG Sales team using the below link, they will certainly help you to upgrade your AVG subscription with the best offer price and current deals. (https://support.avg.com/support_sales?l=en)
Once you purchased and upgraded to the AVG Ultimate (Multi-device) bundle, your existing AVG Internet Security subscription can be merged with the AVG Ultimate and the remaining validity period will be carried accordingly. You may need to request the product merge, at the time of purchase. You may need to request the product merge, at the time of purchase.
Thank you for your understanding.
FYI - before posting on here I tried the sales link 8 times over few days. The 'Start Chat' button does not function..  

Hi – I’m currently part way through an annual subscription for AVG Internet Security. At renewal this cost me £74.99 for 10 devices.
I’m considering upgrading to AVG Ultimate. I see that the annual cost of this is £99.99, with a first year special offer of £69.99.
So – can I upgrade mid way through my current subscription and what would the cost be ?
Or – if I wait until the current subscription ends (May 2022) what would the cost be to start a new AVG Ultimate subscription then ?
And if I do decide to upgrade now/soon how do I make this happen ?
Thank you for your assistance.

Hello Keith,
Thank you for reaching AVG Support Community.
We're glad to point you in the right direction.
We request you to contact our AVG Sales team using the below link, they will certainly help you to upgrade your AVG subscription with the best offer price and current deals. (https://support.avg.com/support_sales?l=en)
Once you purchased and upgraded to the AVG Ultimate (Multi-device) bundle, your existing AVG Internet Security subscription can be merged with the AVG Ultimate and the remaining validity period will be carried accordingly. You may need to request the product merge, at the time of purchase. You may need to request the product merge, at the time of purchase.
Thank you for your understanding.
We are sorry to know this, Keith.
We will help you to contact our AVG sales team using the below phone number Great Britain: +44 (0) 800 652 4940.
Also, you can try to reach our AVG billing & sales team using this link: https://support.avg.com/support_sales_chat?l=en in a different browser and check.
Thank you.
FYI - before posting on here I tried the sales link 8 times over few days. The 'Start Chat' button does not function..