Wow, you got ripped off there, I would go back and demand a refund!! ;D
I have one of these and have had it for a few years, with excellent service out of it, they are a great machine.
The only real issue is a leaky steam tap after a while. I fixed mine (temporarily) by filing back a bit of the steam valve shaft, as shown in tips and tricks here: http://www.coffeeco.com.au/articles/repair.html
There are also a heap of useful articles on that site for the Nemox, showing how you can strip it and clean it etc.
The other solution for leaky steam valve by a CSer is here, which looks like a good one: http://coffeesnobs.com.au/YaBB.pl?num=1311237977/0
Its also easy to take off the collar which will give you easy access to the group head and gasket, which you can remove and can give the area a good clean.