If you do not know the password and have no access there is only one thing to do to open your account again. You will have to call the Blizzard customer support and have them reset the account.
Depending on what you need to contact them for, the easiest way is to go to the Blizzard website matching your locality and go to their Contact Options. If your question is related to your account, you will need to contact Accounting/Customer Service. For technical issues you need to contact the technical support.
If your Blizzard password is invalid or won't let you in then you need to contact Blizzard. Get them to reset your password using the email you have registered for the account with. If your email has been changed, then contact Blizzard and see if they have a record of suspect activity on your account.
Try asking Blizzard customer support for the most accurate information. They are renowned for their customer satisfaction, although they sometimes take a long time to get in contact.
Contact the Blizzard account and billing department, prove that the account belongs to you and have it restored.
Without knowing what type of account you are talking about, the question to how it ended up in your friends list can not be answered. Contact customer service where you have your account, they should be able to help you.
There isn't a customer service email or phone number that you can use to contact them.
Contact Customer Service
Contact MSN Customer Support
You will need to contact Blizzard's Billing and Account Services via phone to have them try to help you. This will generally include faxing them proof that you are the account holder. The website with the numbers to call is listed in the related links below.
go and contact customer care..
Contact the support or customer service team at that website.
You need to contact the bank's customer care department if you need any help with your bank account