If you have an executed agreement between 2 parties (property owner / tenant) there should be a clause regarding performance of both parties.
Confer with listing agent or attorney.
Depends on how the contract was authored you might be able sue DISCLAIMER: without review of paperwork difficult to make any full statements.
Read your contract. If you can sue forward a demand letter for payment per lease agreement you might be able to retain the deposit and 1st months rent or even more !
An amendment would need be signed by both parties attach to executed agreement
~ National Featured Realtor and Consultant, Lecturer regarding Credit Repair, Mortgage Loan Officer