mgeloUhhh, it sounds like we shipped you the wrong thing... You were supposed to get 1 pack of lead which has 12 refills, but my guess is the warehouse workers just grabbed 12 boxes instead. How many of these do you now have in your possession?
http://www.amazon.com/Rotring-Tikky-0-5mm-Replacement-S0312650/dp/B000VKCD0O/
Don't worry, you won't have to give them back, we just want to sort out the problem at the warehouse!