Ongoing Ceiling Leak Issue: Seeking Legal Options for Resolution

Hi all, I’m dealing with two major issues in my flat and need some advice on how to move forward. The builder is still under the 5-year warranty, so I believe they’re responsible for fixing these issues, but things have been dragging on for months. Water Leakage Issue: I’ve been facing a persistent water leakage issue for over four months now. Initially, I reported it to the builder, who attempted repairs by working on the flat above mine. However, after multiple attempts, the leakage has only gotten worse. The top-floor owner is refusing to allow a water pressure test to check if the pipelines are broken, which seems to be a key part of identifying the issue. The builder suggested doing a PU grout treatment, but in the process, they damaged the electrical wiring in my ceiling. Now, the top-floor owner is again refusing to cooperate, leaving the problem unresolved. Since the builder is still under warranty, what are my options here? Can I force the top-floor owner to cooperate, or should I pursue legal action against the builder for not resolving the issue? Electrical Wiring & Ceiling Damage: During the water leakage repairs, the builder damaged the concealed wiring in my ceiling, causing a power outage in the room. After multiple attempts to join the wires, the builder now says that joining won’t work and suggests a complete rewiring. The problem is, they claim they can’t conceal the new wires and will have to do open wiring, which would involve breaking through the walls. They’ve also told me they won’t be doing any repainting or restoring the ceiling to its original condition. Why should I bear the cost of open wiring and any wall/ceiling repairs caused by this? Shouldn’t the builder be responsible for fixing this and ensuring the wires are concealed as originally planned? I’m also wondering if filing a complaint with RERA (Real Estate Regulatory Authority) could help me. Since the builder is still under the 5-year warranty, would RERA force the builder to conceal the wires, restore the ceiling, and cover the cost of repainting or any other damage? I’d appreciate any advice from others who have faced similar issues or are familiar with my rights in this situation. Thanks in advance!