Hi,
you can send them a latter that why you are submit your documents late if there is any kind of issue tell them about that issue if you have some evidence of your documents then make a photo copy of them and send it with your request latter for giving some more time but make sure first you have to give them your case all details like your case number and name and copy of there latter "they sent to you with your request latter and try to give them a right time to submit....
i hope it every thing will be fine...
Ray masood