First, tell Nokia you intend to contact the ACCC about this refund, as the device isn't "fit for purpose" if it can't store files greater than 4GB.
If they don't instantly change their tone (as many vendors do once you mention certain four-letter agencies like ACCC or ACMA...), then lodge a complaint with the ACCC.
Ingram in this case are just acting as a warehouse/drop-shipper, same as they do for Microsoft and various other OEMs.
... although our (Australias) Data Retention and 'Lawful Access' legislation is crap, at least the Consumer Guidelines still generally favour the public! :)
They have operations in Australia, so they'd be covered by Australian Consumer Law[0], which requires goods to be of "acceptable quality". IANAL, but I think you should have a good claim under that given most other phones support exFAT, and the deficiencies with FAT32.