You need to see if you can return some of your fish and read the all the cycling information here. Your tank is NOT cycled properly and massive water changes are in your future every night for quite a while if you can't return your fish.
After the ammonia has come down, you will still have to do water changes - your nitrites will spike up and that will hurt your fish. These forms of nitrogen are toxic and are burning your fishes gills at the levels you have.
If you can't return the fish, is there some friend with a tank you can get some good seeded/dirty gravel from? Put it in a panty hose.
Also, go buy some bio-spira and follow the directions carefully! This will help get the good bacteria jumpstarted to help breakdown all that ammonia.
Bump up your water changes to 50%, feed the fish everyother day, not every day and don't overfeed them. I also wouldn't vaccuum the gravel - you are sucking up the good bacteria too.
What is your filtration system?
Cathy
