Yes Army judge is saying the right thing. you should do periodic inspect of your property. you can call a plumber to fix the leakage. but to fix the whole damage, you must do contact with a reputed Water damage repair company.
They will provide you all the services to fix your whole property.
Hi
well for this damage absolutely your neighbor is responsible. Before taking any step you should do contact with a Water damage repair expert. Which will give you the whole services like mould removal,reapiring and gives insurace reapirs.