I just called the MSC Casino Dept. to arrange a line of credit before our cruise. I have done this before every cruise on NCL, Princess, Celebrity and RC. I asked 3 different people how I could arrange a credit line. None of them had any idea of what I was talking about and had never heard about lines of credit. Is it possible that you cannot arrange this on MSC, or is there a different department, other than the casino office, to call?