I can't update my bankcard

Hello Michael,
Thank you for contacting AVG Community Support.
We understand that you are unable to update the card details via our website. We will certainly look into this and help you. 
You can reach our AVG billing & sales team via live chat or voice call using this link: https://support.avg.com/avg/en/ww/home/current/contact and they will check and help you with updating card details.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
Thank you and keep us updated.

Hello Michael,
Thank you for contacting AVG Community Support.
We understand that you are unable to update the card details via our website. We will certainly look into this and help you. 
You can reach our AVG billing & sales team via live chat or voice call using this link: https://support.avg.com/avg/en/ww/home/current/contact and they will check and help you with updating card details.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
Thank you and keep us updated.

I have 2 bankcards.I tried 4 times to update my card.It doesnt work
KR Michael??