I installed new droplet with Ubuntu 14 x64 and LAMP.

Followed this tutorial to upgrade to PHP7
https://www.digitalocean.com/community/tutorials/how-to-upgrade-to-php-7-on-ubuntu-14-04

And when I visit phpinfo() I get that my php version is PHP Version 5.5.9-1ubuntu4.14

Why is that and how can I fix it?

Best Regards