I think that ban system is preety old and it must be in other format like :
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Notice
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Your account has been banned for : (reason )
You get ban on (date)
Ban leight : (days)
Ban expires in : (date)

Comment : (place where admins/mods can give material why person got banned)

Hi,

We do have a tutorial which can do what you're asking. It creates a custom banned screen. https://help.forumotion.com/t139302-custom-ban-screen