I posted 6 letters before santa, 1 during. I can't claim any when I should be able to claim 6.
Did you hand in the first 6 points? If so you would have gotten the peppermint outfit and 6 rolls on the Party hat.
If you didn't hand them in when Santa arrived but instead posted another set of letters and held onto your points its likely your outfit is in the sleigh.
If you are thinking you get presents (white/blue/purple etc) for handing in the points you don't you get those presents when you hand in the letters the points are just rolls on the Black Party hat and the weekly prize (1st week is the peppermint outfit)