Good news
I got this email just now:
Dear XXX,
Please accept our sincere apologies for the inconveniences we may have caused you for not being able to respond the e-mail you sent us regarding our 9,000 Avios promotion until today. We correctly received your documentation and we would like to inform you that we have proceeded to activate your Iberia Plus account and to generate a new temporary access PIN code for you to enter into your Iberia Plus personal profile. You will receive your PIN soon, inside the e-mail address associated to your Iberia Plus account.
Keep in mind that this is a temporary access PIN code, therefore, you must change it once you enter your profile. In relation with the 9,000 Avios campaign for flights booked on iberia.com, we have reviewed your request and the information you supplied. We have sent the information to the relevant department for the awarding of the promotional Avios, if the information in your booking is correct, you should see these credit in your account during the following week.