Just as a reminder, Section 1950.5(g)(1) of the Civil Code requires a landlord to provide an accurate accounting and refund of a tenant's security deposit within 21 days of their moving. Based on what you've posted, they have failed to comply with the 21 day rule, particularly with respect to the extra security deposit money you paid.

If a landlord fails to comply, Section 1950.5(l) of the Civil Code allows the Small Claims Court to compel a landlord to pay the tenant twice the amount of their security deposit in addition to any monies they improperly refused to refund.

In order to go to small claims court in California you must first ask the other party for you money. If you have already done so, I would head straight to court give your potential windfall. Just make sure you have all your ducks in a row as far as supporting paperwork, dates and times of your phone calls, who you spoke to, etc.