Iprint Appliance 23.4 appliance

i can see the upgrade on my appliance 5.0.3

When i want to install it, i my keyin a new registration key, that i can't find on my customer center.

I had open a case without success, the supporter has closed this cases without help!

The registration key for iprint appliance 5 is not accepted!

What do you with your custormer, OT?