wrong php version in phpinfo, phpmyadmin says mbstring ext missing (its not) (no replies)

Windows10-64bit
version-3.0.6
apache-2.4.27
php-7.2.3,
mysql-5.7.1
icon-green
127.0.0.1 localhost ::1 localhost
localhost-yes
8a-no
9-yes
11-Avira
c:/wamp64

After a installing wamp, I have updated php from version 5.6.31 to version 7.2.3
LoadModule php7_module "${INSTALL_DIR}/bin/php/php7.2.3/php7apache2_4.dll"

However, the version at the top of phpinfo and in the Configuration apache2handler section says 7.1.9

I tried opening phpmyadmin (version 4.7.4), message displayed is
The mbstring extension is missing. Please check your PHP Configuration
There is no semi-colon in front of
extension=php_mbstring.dll
extension_dir ="c:/wamp64/bin/php/php7.2.3/ext/"
php_mbstring.dll is in the ext folder.

Am I missing some configuration?