Sale of application form was for 24.11.2014 to 23.12.2014 and date of submission of offline application is 15.12.2014 to 09.01.2015 whereas the last date of submission of online application is 09.01.2015. So, you can still get off line form from the developer's office showing the receipt copy of the payment made.
Better, visit the developer's office and sort out the issue. Did you get any receipt for your payment made? If yes, then present it. You can also get the form from developer's office.