Tarraco leaks

We have had our Tarraco since June 2019. We got it with 50km. Since December 25, 2019 we now detect water entry from the gap hissic vehicle sky and covering of the C-pillar. The water then runs along the C-pillar between the back seat and the cargo compartment. Sometimes it drips into the cup holder in the cargo compartment. This had run half full after a rainy day. Does anyone know this problem from you or has had similar experiences?