How long do brakes last?

Since about 15,000 km, my brakes have been “rubbing” when braking at speeds of more than 200 km/h. Since then, the speed from which this occurs is getting lower and lower. When I order my V60, I was written by the “brake disks and blocks running time still about 10,000 km” – since then I have driven about 6,000 km. Meanwhile, the brakes are already rubbing down when braking down country road speed. My V60 probably gets in 3-4 weeks – until then I still have about 1,000 km to drive. How long is it realistic that my brakes still hold? and how do I realize that the change has to be made now and how long is it still time (km) from then?