Messed up my Zabbix setup, want to redo, how to reset

[bisana]

Hi All,
I have been trying out Zabbix setup and I have done configuration setup, now I want to reset it back to the fresh installation. I mean the pristine setup
How can I do it ?
Like to mention here, I have my "admin" password and my query is not to reset the admin password, but to reset the setup to the default one
Help and guidance requested
Thanks
Joseph John

[bisana]

apt-get purge

I did a
apt-get purge zabbix-server-mysql zabbix-frontend-php
followed by
apt-get installed zabbix-server-mysql zabbix-frontend-php

But then, when I go to

http://localhost/zabbix

It shows page not found, I checked in the apache2 "/etc/apache2/sites-enabled", but then also the link shows page not found

May be the uninstall and install steps has to be checked whether it is being done properly.

I am using Ubuntu 16.04 LTS