Want to add a cab to my AD-30 but it has 2x16 ohm speakers

[barrington]

Apparently my amp is one of a few that got loaded with the wrong speakers (16 ohm) so i am unable to run the speakers aswell as an extra cab. i was told that orange were offering some assistance in sorting this but dont seem to be able to find any info on how to go about this anywhere, could anyone point me in the right direction?
ta folks
x
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