Yeah, we really need more info. What country you're in, what group you were part of, etc.
We went through basically the same thing. It's a very long story that I don't feel like getting into, but we ended up with the IHF. My fiance had gotten up to a 3rd dan ranking with them many years ago, and a master we know put him in for a 4th. We both got demoted to a lower dan ranking in the switch, but.... c'est la vie.
At the time, I posted on here asking the same question, and ended up talking with some Jin Jung Kwan guys in the Midwest (of the US, if you're from another country). They're a lineage that's part of the KHF. They were great, and seemed to have a great program, especially if you don't have a master-ranked instructor that can handle dan promotions for you. It wasn't the right fit for us, but if you're in the US, look them up.