Your best bet is DTI. I had bought a part for my car from a part store owned by a Chinese! It was an expensive part (17500 pesos). It was defective. I took it back to return. The part store said I had to have the original plastic wrap with it in the box to return. I complained to consumer affairs at DTI. they arranged a mediation and decision in 3 days. They ruled that I paid for the part, not the plastic or the box. They returned my money in full.