I didnt get PR from the duo cash cup i placed 3,756

my and my duo played the duo cash cup (in middle east) we saw that to get pr we need the get 7500, in the end we got 3,756 but we didnt get any pr.
we saw that the people before us and after us got pr but there was also some duos we didnt got any pr.
me and my duo names is:
aminy276 and monaco noam 47
please help

check fortnite status twitter the event will be played another day