Engine Cooling System problems of the 2009 Dodge Ram 1500

I received a recall for my truck that had something to do with the air conditioning/heating. When I took my truck in to have the recall fixed, it was already not working. There is a knocking up under the dashboard, air/heat only comes out vents in dash and defrost, it will not blow out of other vents such as floor, etc. . I took my vehicle to the dealer to get the recall and problem fixed. Obviously my truck was already faulty due to the recall issue. When I picked up my truck, it was still "knocking" and the air/heat was not blowing out of all vents. I told the dealership it was not fixed and he told me that they fixed only what they were supposed to and I would have to "pay" to have the problem fixed! the problem occurred "as a result" of the recall, and I feel it is there responsibility to fix it. Then in July 2013, I called the same dealer to have a new recall fixed (rear axle pinion nut-NHTSA 13v-038). They did not have the part and needed to order it and told me they will call me when it arrived. Today, November 5, 2013, I still have not received a call from this dealership to fix my rear axle pinion nut. I have been taken advantage of by this particular dealership over and over again. The only time I take my vehicle to this dealership is to fix recalls and they still find ways to take advantage of me. For all other needs of my truck I go elsewhere! just need some direction on the pinion nut. I would like to have it fixed before it stops working and results in a crash. In addition, I still feel that the dealership should fix the air/heat issue, due to that fact that it stopped working as a result of the defect. I do not believe it will cause a crash unless it changes and quits blowing out of the defrost vents.