Pareena Infrastructures — delay flat possession

Address:

Omaxe City Center C-7A,,2nd Floor,Omaxe City Center,, Sohna Rd, Block S, Sector 49, Gurugram, Haryana 122018, India, Gurgaon, Haryana

I have booked 3BHK (1770 sq ft) flat in pareena express heights dwarka expressway sector 99 gurugram, in 2012 and paid 50% at the time of booking, I choose PLP plan.
till now no possession.
no satisfactory reply from builder also.
builder ---Phone: +[protected]
construction already delayed.Can I get refund from builder if i return the flat.