Concorde Group — Concorde South Scape

Hi, bought a flat in Concorde South scape, it's only less than 8 years old, but i facing a water leakage all over the ceiling, afraid of falling in few months, if the issue is not fixed. I tried to waterproof the roof myself, but waterproofing experts suggests to do for the whole appartment ceiling, I can't afford that. So I need a solution to resolve this issue ASAP..