Getting a refund form a non refundable clause agreement

Description

Aloha,
Future Buildings Has refused to refund my agreement and the very large deposit that was required by them.
I asked for this to be cancelled the very next business day where i was told i could not or I lose my entire deposit.
no exit strategy was proposed to me.
If you have a solution to my problem i would very much appreciate the info.
Ma-Halo