When is your birthday? You said it is in January, so is mine! Mine is the 21st.
I know I can't truely know how you are feeling, but why don't you tell your parents that you are unhappy with tue type of cake you get, at least? I don't like cake either, so have Ice cream. I know that eounds a bit odd, but I love Ice cream. Try to get something like that.
Remember, your birthday is your day; no one else's. Don't let your family bully you into a day that you hate.
And remember, you are not alone, mama Sam, you have us. Your second family. Your Ficwad family.