I cant login DID NOT RECOGNICE YOUR NUMBER

Hello,
i need your help i cant log into my old facebook account i dont know what i do,i tried to log in like i always do,with my old login phone number and password but its says WE DID NOT RECOGNICE YOUR NUMBER,i did not change my login number so please help how do i get back into my account,i do get email nofications about that account but i cant login.