Hammer, Please strongly consider returning the fish no matter what. It will be cheaper in the end even if you get nothing for them and have to re-buy other fish, later. IMO, fish being kept in a tank full of ammonia and nitrItes is like a baby being kept in a room where both parents are chain smokers. The baby's lungs will be damaged and he won't develop properly. As well he doesn't have the ability or given the choice to move to a cleaner place. I don't mean to sound harsh but I think that my analogy is fairly accurate.
Trust me when I say that we members on all fish forums see uncycled tanks all the time...We also see the end results...All the time. Also, many of us have made the same deadly mistakes in the beginning. I know I did.
There are many knowledgeable fish keepers on this forum willing to help and give great advice...The advice is free; What you choose to do with it gives it value.