rent to own house: BUYER WOULD WANT TO BACK OUT

by MARVIN
(MANILA, PHILIPPINES)

I WOULD LIKE TO ASK SOME LEGAL ADVICE IN REGARDS WITH THE HOUSE THAT I PURCHASE. IT IS NOT READY FOR OCCUPANCY UNTIL NEXT YEAR OF MARCH. I WOULD LIKE TO PULL OUT EVERYTHING THAT I INVEST TO THE HOUSE. INCLUDING DOWN PAYMENT AND RESERVATION. WHAT WILL I DO?