car is raining in

Now then!,

I have got myself a MK6, 2002 polo which is letting in rain water (Bummer) in to the O/S drivers side foot well, not a little but a lot.

Now i think it is the sunroof drain. But it is coming out from above the drain, down passed the fuse box and then down the trim into my carpet, and making it into a swimming pool. How can i sort this and how hard is it to sort.

Thanks