Volvo XC60 2018 inscription

I boyght this car before one week. Yestrday I have noticed that there is a leakage in the baggage see pictures.
Today the area of water if even bigger.
There is one part that is missing from the roof, and from there the water is dropping inside the trunk.
Around that area you can easily see the water circles.

I am attaching the pictures in order for you to have a better understanding of the problem.

Please advice me what should I do in order to resolve this issue. Can it be condesation or can it come from the antena area? Anyone had similar experience?

Thanks in advance.