You can get your wamp back by following two steps:
Step 1: Set privileges to mysql
i. Open command prompt and navigate to mysql bin folder which is usually present in
"C:\wamp\bin\mysql\mysql5.1.36\bin"
Execute the below set of mysql commands with appropriate changes to set the new password
MYSQL -U root -P
UPDATE mysql.user SET Password=PASSWORD('YourNewPassword') WHERE User='root';
Step 2: Configure the above set privileges to phpadmin/wamp
i. Locate "config.inc" file in the wamp folder, typically it is present in
"C:\wamp\apps\phpmyadmin3.2.0.1"
ii. Open it up using standard text editor such as notepad etc.

iii. Edit the values of user/password to what you have setup in the previous step.
iv. Save the config.inc file and do not forget to restart all the services by rightclick wamp on the