ISO Region - invalid for UK

Our Website developers have an “invalid field” for the State/Region address field.
We’re a UK firm and our customer addresses held WordPress dont match Infusionsoft defined American State/Region listings which is causing an error.

How do other Infusionsoft UK users resolve this issue?

thanks
Caley Lewis

I would love to find a solution for this. When importing contacts via csv there is no problem for me but when using the API I get the following error:

BILLING Region is invalid

Did you manage to overcome this problem @Caley_Lewis?