Cosmopolitan Project House

I bought and moved to my house in October 2020 in Sky City. A few days ago I was deep cleaning my house as I moved the fridge I realized the wall behind is damp and has white marks sort of like mold. On the othe side of the wall is a bathroom and the basin is situated exactly on the damp wall, I assume there's a leak in the pipes. A guy came on Thursday 20/01/22 to asses the house for any rain/storm damages my husband advised him about the wall issue he said he is only checking for storm damage for any other issues we must log a query. A query was logged via their link and a lady called then said they will send someone on Monday 24/01/22 to asses. No one came yesterday when I call today the lady I spoke to said I should report the issue to my insurance why am I paying insurance if I'm not going to use it and the house came with 1 year warranty so this is an issue for my insurance company. I told her insurance says this is faulty piping when the house was build there's leak inside the wall she requested a report from insurance company stating that. I feel like I am being sent from pillar to post for no reason and the staff is not sure of the process because I got 2 different responses from 2 agents. First they say they will send someone to asses the issue now they can't help because the house has 1 year warranty and I moved in October 2020. I'm a first time home owner who just needs to be pointed in the correct direction I am not happy with the service I received today as for the lady to say "why are you paying insurance if you won't use it".