Your first offense was for allowing a friend to take creatively spawned items off your claim, not for spawning a boss.
Your second offense was for leaving a spawned sword in a chest unclaimed, therefore breaking the rules. Had you kept it in your inventory it would have been fine.
Your third offense, in which I removed your creative access, was for spawning items such as xp tomes for other players who were not part of your claim. You had also spawned in crafting ingredients to bypass the creative tagging.
Additionally, on your third offense, you were quoted talking to a friend where you stated: "I'M COOKED // TOAST IS BANNING ME SOMEOME FOUND OUT," indicating an intentional disregard for our rules and intent to hide your actions. It does not matter how many things you buy in the store, you are not getting your creative back due to your blatant disregard for our community guidelines.
If you truly regretted your actions, no one would have had to "find out" about your wrongdoings.
Appeal denied.