Kuat, maybe this will fix your problem.
Calling the right department and phone numbers
There are 2 different departments that you can call, namely the Account and Payment support and the Technical Support. Choosing the right number is quite important else you might end up waiting in the wrong phone queue for quite a long time!
Account and Payment
You should contact these people if:
You want to change certain parts of your account registration information
You forgot the answer to your secret question
Your payments to Blizzard are getting rejected
Your payment methods are blocked
You?re having payment problems on the Blizzard Store
Account and Payment Support is available 9:30am to 10:00pm (Paris time), seven days a week.
Austria: 0800 362066
Belgium: 0800 81066
Denmark: 80 60 22 14
Finland: 0800 97442
France: 0805 540514
Germany: 0800 5890644
Ireland: 1 800 995 092
Italy: 800 928389
Netherlands: 0800 0202164
Norway: 800 83996
Poland: 0800 702217
Russia: 8800 5550104
Spain: 900 812669
Sweden: 020 1605820
Switzerland: 0800 001177
United Kingdom: 0800 0288246
Phone support is provided in English, French, Spanish, German and Russian. However, as there are many nationalities working at Blizzard they can try to answer your questions in a different language but this cannot be guaranteed.
Source:
Battle.net Support
If you live in one of the listed countries then calling Blizzard is completely free when using a house phone. Do note that if you?re trying to call with a mobile phone, charges may apply based on your phone provider. If you?re not a resident in one of the listed countries, check the next session of this guide on how to contact Blizzard

.
If you don?t want to call Blizzard, use the webform located here:
http://eu.blizzard.com/support/webform.xml?locale=en_GB&selection=WorldOfWarcraf
[Guide] How to call Blizzard - Forums - World of Warcraft