These are the methods of contact offered by ch-center:
By email
For billing or new orders contact us at: sales@ch-center.com, for technical support or any other related issues: support@ch-center.com
By opening a ticket
For this you need to have a active account on this www.ch-center.com, after you login access: http://www.ch-center.com/helpdesk/support/index.php/
By calling us
The phone numbers and office hours can be found here: https://www.ch-center.com/support.php
By contact form
You can send us a email from our web site: https://www.ch-center.com/contactus.php
By forum
Here you can get help from our administrators.