Just keep at it - testing and water changes daily. If your readings get higher do larger water changes and cut back on feeding. You can drain the tank down to a few inches and refill if its bad. Its a lot of hard work which is why its easier to do a fishless cycle, but although it seems like forever you will get there !
Thanks Gilli, I have to say the fish do seem happier after a water change! lol. I do wish though the darn fish shop we got the tank from had told me SOMETHING, ANYTHING about keeping fish, instead of nothing at all.
When will I know the cycle is completed?