C.C.
I am surprised to hear this. Fuzzi Bunz has a great reputation. Approximately how old were they when you got them? Do all of them leak? I was given some Bum Genius that were about 3-4 years old. The velcro didn't hold well and the elastic was definitely loose. Keep in mind as your child grows that they will stretch the diapers out, which was the case with the diapers I got. They chronically leaked, and I eventually gave up. However, I wondered if they would have worked if I had held onto them for when my son was a little older (and bigger). Or, another thought, maybe your child needs a doubler if she or he is a heavy wetter. I ended up getting Grovia diapers and I LOVE them. They fit my son perfectly, and I love that they are a hybrid diaper.
Perhaps you can call the manufacturer or get on a cloth diapering blog to get suggestions.