Hi all, basically there's leakage in the masterbed room toliet. Had seeked advice from contractor is caused by the unit above us. The landlord upstair refused to rectify the problem. He blame it on the unit above theirs now. Understand based on BCA regulation, the unit above is 100% liable for the cost of repair work. But the landlord is refusing to pay for the cost of work. So in such case, is there any relevant authority that I can seek assistance? Thanks in advance.