License issues

We have a reasonable installed base of DiskXtender with versions < 6. In these cases the device was licensed, giving the possibility to use unlimited media with the device.
The last version we bought was 6.10 in combination with LTO2, our distribitor made the following offer (on the moment EMC changed the licensing structure):
BIC-0A1506 / 457-000-256-DiskXtender for Windows File System Manager
LIC-001651 / 456-004-567-DiskXtender for Windows 100GB Capacity
LIC-001651 / 456-004-587-DiskXtender for Windows File System Manager Server
LIC-001651 / 456-004-567-DiskXtender for Windows 100GB Capacity
LIC-001651 / 456-004-567-DiskXtender for Windows 100GB Capacity
LIC-001651 / 456-004-567-DiskXtender for Windows 100GB Capacity

The license manager shows the following:
DiskXtender File System Manager
File System Manager Licenses: 1 (1 in use)
Storage Capacity: 400 GB (400 GB in use)

After using two 200GB tapes the product enters a grace period due to (400 GB in use).
We thought (and I'm sure the distributor also !) at that moment, that 400GB represented the capacity of the device, which would provide us with the same functionality as versions < 6, not the total usable capacity.
When escalating this to the distributor, an offer for an additional 500GB was sent.

EMC changed the licensing structure 180 degrees, going from device to useable capacity giving the product an enormous, unacceptable Total Cost of Ownership.

Anyone has the same experience, or is there something wrong in the initial offer ?

I issued an official complaint to our distributor after serveral phone calls and emails without results.

Best regards,

Geert Vandenbussche