I would keep on calling them until they give you the points back. Iberia is for sure the worst oneworld airline what comes to service. But still, for their Spanish mentality, they are more likely to also break the rules every now and then. I got once a free upgrade for a lang haul flight from them, because of overbooking. That was a nice experience, although the food in Iberia-biz is still worse than on other oneworld airlines in economy. But the seating was great. For me, as an European, they are still an important partner in oneworld, because they have an extensive network in Latin America. If they left oneworld, I would lose a lot of miles.