That's not how it works.
No, you didn't have to put it up. You wanted to, even though you shouldn't have done it.
Yes, those are amazing art, but they are not yours. It doesn't matter how amazing they are. That's not an excuse to do it.
Putting something that doesn't belong to you wouldn't help you to get hired for a commission. It would actually make people who might have wanted art from you to stay away. Because it's hard to take your offer to do art seriously after that, and you don't seem professional nor trustworthy.
I mean, if it was you, would you pay someone who does that?
You're really young, but you need to understand that you can't do that.