Updating my payment details for AVG subscriptions

Hello Volodymyr, 
Thank you for contacting AVG Community Support.
We are sorry to hear that you are unable to update the payment card details via AVG account. 
We will certainly look into this and help you.
Could you please contact 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 this.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
If you have more queries, do let us know. 
Thank you and keep us updated.

I tryed to update my credit card but all the time I received message that problem with my card. I tried to use 4 different cards but the same message

Hello Volodymyr, 
Thank you for contacting AVG Community Support.
We are sorry to hear that you are unable to update the payment card details via AVG account. 
We will certainly look into this and help you.
Could you please contact 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 this.
After clicking the above link, select Account and Billing -> Purchase and Renewal help -> Get Support -> Voice call or Chat.
If you have more queries, do let us know. 
Thank you and keep us updated.