I think NOI's validity is about 2 weeks, in 2 weeks you to email AINP about the interest in the province. Try to email them with the NOI and in corresponding email write an explanation regarding the issue, may be they reconsider,who knows it's better than not doing anything about it, don't waste more time. Worst come worst they will reject the interest still you might have a outside chance. Best of luck.
@MANtoAB do you by any chance have an email address she can use to send the message, because she has checked the AINP website and according to her there's no email address to send the email to. Thanks