I don't know how to grade up, it says u cant request but i don't know the command to do it myself

[Munssss]

I was trying to grade up and it says that i cant requests grade ups but i don't know what the command is to but here is the format for it.

IGN (Minecraft Username): Munssss
WHAT YOU NEED (ROLE/RANK) Grade 12
YOUR CURRENTLY ROLE/RANK (IF ANY): Grade 7
EVIDENCE:

 

[atoki]

REVIEWED
You have been graded up to the grade which corresponds to your play-time​