1) ask for loan from friends and relatives, eg. 10 people, 30k each
if not enough, then try a finance company (not a bank) like Bongman, Anson Brothers...of course they will charge a high interest...but you have no other option other than selling the flat.
Check your monthly budget what you can cut back on and how much you can repay each month.You many need to do an extra job at night to repay your new loan.