Golden Guinea Tree

I've never seen Dilenia alata with reddish sepals as they appear in your photos (they are normally green). If it is D. alata then flowers will have bright red stamens at the center (can't see it in the photo). In contrast, Dilenia suffruticosa does have reddish sepals (like your plant) and it will have whitish stamens at the center of the flower (not red). If you can check the flowers you will know for sure.