My palate expander, is this fixable? (Photo)

I got a palette expander a while ago and my orthodontist couldn't get it on all the way on one side, so it made my mouth really really really uneven! The bone in the top of my mouth is crooked;( they said it may be able to be fixed with rubber bands but I'm just so insecure and anixious that it won't ever be even again. I need answers please, can this be fixed? And how? Thank you.

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