Hi Mohammed. I checked their website and they're only selling SIM cards on their physical stores. Visit Freedom Mobile's find a store page to know the nearest one in your area.
Hi I wanted to get a SIM card but I don't know and the places is there anyway I can pay off some online that you guys can send it to my house
A similar question has already been answered. See the link below.
Link: How to activate a new Wind Mobile phone?