Request a "two week deposit extension". They only grant extensions for two weeks at a time. Here is what they sent me:
The Admission Committee has reviewed your request and has granted you a two week deposit extension. The $250 non-refundable acceptance deposit is now due **
If you are still unable to make the deposit by ** a second request for an extension can be submitted to gssadmission@fordham.edu . Please keep in mind that class registration and field placement is dependent upon the acceptance deposit.