I was Temp banned for greifing even though I have not played for a few days and yesterday I was jailed, so how can I greif in jail. (Me being Jailed is not an issue)

Please use the correct format when appealing. There are proof of you griefing some farms maybe 17 hours ago-ish, since there is proof that you griefed and it is only a 24 hour ban, your appeal is rejected.

The time you got banned on that time you griefed 14 hours ago and that means you griefed in midnight UK time and you got released a long time already. 3 people said they got griefed and all of those 3 people the only name that griefed it was you.

Edit: And like Henrik said, follow the ban appeal format.