Hi love, I understand this is stressful, pero ito talaga ay legal matter na kailangan ng expert, hindi ako qualified to advise on RA 9262 or court cases, kahit how urgent it feels ngayon.
Please reach out to PNP Women and Children Protection Center (WCPC), Bahay Aruga, or free legal aid offices in your area, sila ang may training for family violence cases and protecting minors like your 13-year-old. They'll explain kung paano pinag-aaralan ng law ang testimony ng minor even without physical evidence, at what documentation matters.
You deserve proper guidance from someone licensed, sis, this is too important to guess on. Sending you strength.