Line the inside of a 8-inch springform pan with aluminum foil. Layer the bottom of the pan with half of the ice cream. Top with half of the Heath bar pieces. Top with half of the caramel sauce and half of the fudge sauce (you may need to heat slightly to make them easy to spread but don't make them too hot or it will melt the ice cream). Finsih with half of the Oreo crumbs. Freeze until solid, about 6 hours.
Repeat another layer of ice cream, Heath bar pieces, caramel, fudge sauce, and Oreo crumbles. Freeze until solid, about 6 hours.
Remove from freezer once solid. Release springform outer shell. Flatten out the aluminum foil lining. Slice and serve ice cream cake immediately. No need to thaw out because it will start to melt once on a plate. Freeze any remaining cake.