You can submit the missing documents at the headquarters of the Department of Foreigners at Marszałkowska 3/5 in Warsaw – entresol, room A08 (stand 18).
Before that you have to make an appointment via the online calendar – you must obtain a “B ticket”, which is not available at the ticket machines at the headquarters of the Department of Foreigners.
Please note that in case of failure to submit a passport or application, you can submit them only upon prior appointment, with ticket “C”.
If you want to submit additional documents without a request from the Office, you can do it without a prior appointment, with a ticket “A”