How to get Monetary compensation from Iberia Airlines?

I was suppossed to be back in NYC Jan 11th but did not make it back until the 12th and i believe if i had not caused a scene i would not have been back until the 14th since they told me at first i could not leave Madrid Spain until the 13th. This was a horrible experience, not only did the Iberia workers laugh in our faces and closed doors on us after being in line for 3 or 4 hours but some of the workers even god mad and walked away from the customers. We are talking about hundreds of people here waiting in lines for up to 8 hours, some even more, and then having the gates shut and told to move to another line. Not only did my plane from Santiago leave 5 hours late but when i arrived in Madrid i had to wait from 8pm to 430am to get anything resolved as i myself kept one being moved from line to line for no apparent reason. First they told me to go to ticket sales, then customer service , then check in ....... just horrible. The only reason why it did not take me longer is because a few of us caused a bit of a scene and finally they brough in one lady who helped about 5 of us ( the ones causing the scene ) and everyone else was left in the dark until god knows what time. Well reguardless i would like to know if there is a way for me to claim or file a complain to get some monetary value back for this hle .