new isp speed !!!

got upfraded from 100/100 to 1000/1000

but my download speed is still at 100.... upload is 950 ..

used all day to figure out whats wrong....tried another router directly behind fiber box ......connection direct to fiber box..... change cables to new ones..... nothing seems to help.... isp says that it looks like i have 1000/1000 from their computer.....