One of my users from Canada (we are in US) is getting a redirect loop error when trying to pay for subscription. It's an error she cannot get out of. I checked the logs and the error is this:

authorizenet Single payment error returned 27: Payment refused by payment gateway: The transaction has been declined because of an AVS mismatch. The address provided does not match billing address of cardholder. (27)

what should we do at this point? Shouldn't this error be shown to the user instead of the redirect loop so she understands what to do?

this turned out to be error where authorize.net was not set up to take Canadian payments