Locked iCloud phone Don't know trusted phone number or password

Hi i just got my iphone 7 fixed after almost a year and i go to disable my phone and once that is done i had a hard time finding what my email was so i was thinking and thinking and finally got it but i go to reset my password and this thing called trusted phone number pops up and i don't know what it is so i try and try to think of the password but get locked out with the trusted phone number please can i get some help and it is not a Stolen phone i have emails from when i registered this phone to apple and i cloud please helpppppp .