You have a legal claim against the apartment complex for depositing the check without authority and based on your oral agreement to hold the check. That gets you $300 to the postive from the start. If that withdrawal put you in the red, then you would be entitled to the overdraft fees directly related to that withdrawal.
However, that liability would end at the point of your first ATM withdrawal, at which point you would be charged by a court with constructive knowledge of the cricumstances. However, you can recover for the $300, as stated above, and any overdraft and fee between that unauthorized withdrawal and that first ATM transaction.
Please let me know, if you have follow-up questions.
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