Active job

Shower cubicle leakage investigation and repair

I need an experienced plumber or builder to investigate a water leakage issue for my shower cubicle in an apartment. The leakage might have affected the downstairs neighbor's ceiling which has a big hole (see attached images). This job is to find the cause and to fix the leakage on my property (i have not yet to accept to repair neighbor's ceiling due to this complicated situation but would like to get a quote ).