Can I request for this to be reviewed at a later date? This is because I have received a warning for something I didn't know was a rule and even after apologising and admitting I didn't know it was a rule, I still have a warning.

Can I request for this to be reviewed at a later date? This is because I have received a warning for something I didn't know was a rule and even after apologising and admitting I didn't know it was a rule, I still have a warning.