I'm having an error while trying to buy Internet Security

Jarne, The website (http://www.avg.com/ww-en/homepage) appears to be working OK. Have a look @ this new form link (http://support.avg.com/support_contact_form) to get chat/phone support. Otherwise, When available, A member of the official AVG Community Support in Brno, Czech Rep… (Working Hours [Mon-Fri] 9:00am - 5:00pm CET) will see your topic & respond but obviously please bear in mind that it's now the weekend.
AVG Guru

Gives me this error:

Internal Server Error - Read  The server encountered an internal error or misconfiguration and was unable to complete your request. Reference #3.13a9645f.1418557581.44654b96 

I wanted to buy AVG Internet Security 2015 + TuneUp.

Hi Jarne,
What is current status, were you able to solve it or do you still need our assistance?
Thanks

Jarne, The website (http://www.avg.com/ww-en/homepage) appears to be working OK. Have a look @ this new form link (http://support.avg.com/support_contact_form) to get chat/phone support. Otherwise, When available, A member of the official AVG Community Support in Brno, Czech Rep… (Working Hours [Mon-Fri] 9:00am - 5:00pm CET) will see your topic & respond but obviously please bear in mind that it's now the weekend.
AVG Guru