Negative review on first time experience with agency

An estate agent in the Phoenix branch told my landlord to keep my entire deposit, which is against the law (I gave proper advanced notice of 30 days and broke nothing in the house). They said the land lord keeping the deposit is part of the lease. When questioning the agent, they told me "The money is with your land lord, not with us, go speak to them". The agent said the landlord keeping the whole deposit is part of the lease which I know is lie. The landlord and I had to negotiate, I lost some of my deposit for no reason. On top of that they took over a day to send my land lord the exit report.