I'm having power chains for about 4 months and the gap is still the exact same, how can I close it? (photo)

It looks like the space is actually close between your upper central incisors, except that the point of contact is more gingival (higher) and you want the point of contact to be lower (towards the bottom of your incisors). Sometimes, this can be accomplished by adjusting the angulation of the teeth with either bracket repositioning or wire bending.