Finally received it after just over a month and so many frustrating interactions with 'support' - although kudos to the people who finally pushed it along.
Although I did have 3 previous failed delivery attempts - UPS seems to be as dysfunctional as Corsair.
Naturally, it has the same problem as the previous 2 units and after 3 strikes I have had enough.
I will send the replacement back, try to find a capable technician locally to address the defective fan and then never have anything to do with Corsair ever again.