Can I unsubscribe from all services?

Yes you can, but be aware that all pre-paid and post-paid rates plus your leftover credit will be lost.

And all configurations and numbers associated with your account will be lost too.

To unsubscribe, you need to go to the USER section, select "Change personal data" . At the bottom of the page you will find the link for unsubscribing from all Messagenet services.