Can't read all of the Service PIN

Brand new just scratched the service pin I can read 9 out of the 15 numbers on there. This isn't the first time it's happened but usually the numbers have a small part visible enough for me to guess the numbers that I can't see but this time it's barely ledge-able. I've tried guessing because there are some that I can guess but the two that i can't can only be 1,3, or 7 and when I try different variations of the numbers it continues to say that the pin has already been used but I know it hasn't because I just scratched off the grey.