Lodz Poland Galaxy Garden Unit ready

Hi, I bought one bed Apartment in 2007 and is due for handover in black finish this month.
My financial situation has changed dramatically and can not raise money to
complete this handover. I put my unit for sale beginning of this month to no avail.
Is there any one out there who can advise me with what other options I have if I cannot complete.
I put 20% deposit towards it's purchase in June 2007.I do not mind if I can sale this unit urgently at a loss.
Thanks