I feel for you, and understand the desire to vent. But consider for a moment .... you're dealing with people. From the photo it looks like they may have inadvertently replaced the wrong driver. In the meantime they have supplied all those extras - and they are a good bonus. Why not try calling them back, explain what has happened (send an emailed picture), and see if this time they can simply send you the replacement driver for you to fit yourself.
Alternatively - contact Rosmadi (PM him here - http://www.head-fi.org/u/146072/rosmadi-mahmood) and see if he can expedite things.
My dealings with Sennheiser have always been excellent - and I'm sure this is simply an error that can be easily fixed.
Thanks Brooko, I already tried calling back today and I got nothing but answering machines. I'm over the initial shock and I'm going to call back in the morning and I'm sure they'll right the wrong. It really was the easiest return I've ever had to do, I was just very disappointed to hear the same results as it returned. They were very friendly over the phone and I know they're a great company.
I'm just having a "why me..?" moment. Sennheiser still makes awesome products and I'll stand by that forever.