Brake Disc Pads problems of the 2006 Volvo XC90

On January 29, 2007 I took my 2006 Volvo Xc90 2wd to the Volvo dealer for the 15,000 mile scheduled service to include the scheduled tire rotation and balance. The car had 14,764 miles. The service advisor called later in the day to state that (1) I needed front brake pads, and (2) needed four new tires because the original equipment tires were completely worn out. When I asked why those items were needed, he told me (1) the front brake pads wear early because they aren't large enough to support the weight of the car, and (2) the original 17" pirellii scorpion zero tires are a performance tire and "too soft" for the vehicle and thus wear out prematurely. He estimated I had about 1 or 2 mm of tread left, and advised me not to drive in the rain. I spoke to the Volvo dealer service manager the same day who said he would look into getting me 4 new tires free from pirelli as a one-time "goodwill" gesture. On January 30, 2007, the Volvo service manager called to say that because my car was under 15,000 miles pirelli had agreed to replace all 4 tires free. The 17" tires needed to be ordered and would arrive in 4-6 weeks. The service manager assured me that my car was safe to drive until the new tires were installed. On March 18, 2007 I noticed that the tread had completely worn away on both back tires, and belt is showing through. On March 19, 2007 I called the Volvo dealer to find out what was the status of my new pirelli tires and was told that there were no 17" pirelli tires in stock, and they had to be special ordered. I told the service scheduler that the car is undrivable because the tires are completely bald. I am still waiting for the Volvo dealer to call me back.