Um, I don't think 1 tsp is equal to 1 campden. 1 tsp of bisulfate SOLUTION is equal to one campden. That means that you add 1 tsp of it to 1 gallon of water, and then add 1 teaspoon of that solution to your cider.
You should use 1/4 tsp per 5 gallons if you're using powder.
So, you've overdosed it to the point of being undrinkable. What I would do now is some "splash racking". Vigorously siphon your cider to a different container, about 3-5 times, while splashing down the sides of the container. This should help alot. No way should you even consider bottling this until you get rid of most of the sulfite and after that maybe add some sorbate before sweetening.