What ammonia "neutralizer" are you using?
Using products like Ammo-lock will actually work AGAINST you in the long run. Unfortunately, it sounds like you are in the midst of a fish-in cycle. The only way to get through this is with a lot of water changes. If you could get a freind with a tank to donate some mature media material to you, it will greatly help you. The only product I would suggest you use in addition to the water changes would be a quality dechlorinator like Prime or Stress Coat+ which converts the ammonia to ammonium (which is LESS toxic, but still dangerous). This less toxic form is still available to your bacteria to process and therefore will still promote their growth. The problem with products like Ammo-lock is that it actually completely takes out the ammonia from the water, which is good for your fish in the short run, but BAD in the long run since you will continually have to deal with this chemical additive with your tank, or you will have a massive ammonia spike at some point.