Wow, that was a very good write.
It's a poem, a letter and you're able to write all this staying in this 'personas' character, being a prisoner. I imagine almost a Rapunzel kind of scene, and a crude and cruel father.
Wonderfully written.

However there were some cliches that were evident here that made the poem a little more predictable than I would have liked. Like in these places:
"Screaming, accusing,and anger is all i see
These chains are not letting go of me

Someone help me, I'm in despair
But help in here is very rare"

But at the same time, I loved this stanza:
"There is one main creature
Who feeds on my depression
he has two wicked features
His foolish ignorance and aggression"

Keep on writing. Hope to read more from you soon~ ;)