Solution:
There are 2 php.ini files.
One in \wamp\bin\php\php{version}\php.ini this is ued ONLY when you run the PHP CLI.
And one in \wamp\bin\apache\apache{version}\bin\php.ini which is actually a SYMLINK/JUNCTION to a file called \wamp\bin\php\php{version}\phpForApache.ini which is used by PHP when running under Apache.
Anyway the correct way to ensure you edit the correct file used by PHP under Apache is to use the wampmanager menus like this
(left click) wampmanager -> PHP -> php.ini
THis will open the default editor on the correct file.
Change max_execution_time in that file, restart Apache and you shoudl be fine.
After your comment
Then I would look for a php.ini file in the wrong place.
In WAMPServer the php.ini file should only exist in the \wamp\bin\php\php{version} folder and the \wamp\bin\apache\apache{version}\bin folder although in later versions of WAMPServer the file in \wamp\bin\apache\apache{version}\bin is actually a junction file (SYMLINK)
Also there should be no reference to the php folder on your PATH so check that also.
Also search you boot disk for any php.ini files, if any exists outside the \wamp\ folder structure remove them. Some bad advice sometimes suggest copying things into windows\system32 but this is a bad idea in WAMPServer