Although this is not aforum on houseplants, but on the art of growing bonsai, some suggestions. Your plant is dying. It is very weak which causes all sorts of insects to live of the juices in the leaves. You need to get this plant some light. This is a tropical tree species which should get as much light as possible. In summer outside. And after a few weeksof only early morning sun to get use to the light intensity, be moved to a spot with pretty muchfuull sun. Then you will get healthy energy levels in the plant. For now, treat against sucking nisects. Move it outside to half-shade, avoid the mid-day sun (So the 2 or 3 first hours of the day in the sun is fine, the rest of the day it should not be exposed to full sun).