You called him on a number all his exes have and he then told you he’d changed his number which he won’t give you? Then he emails you telling you he needs you?
It sounds as though he wants to regain control. He can contact you but not vice versa.
Please don’t accept such a pitiful man back into your life who is trying to draw you back for more horror. What on earth is he doing with all his exes? I expect he is playing you all along, which probably gives him a sense of power. You are better than that!