The 6 convertible does not leak typically, that is not the norm. The biggest problem is the top unlocked error.
Seems to me that I wouldn't even want the car if the top was still stained, even if they replace the seals that would look like junk? Unless you got the best deal ever. Not to mention if this car had that bad of a leak has it run down into other areas in the dash, will you have future issues?