It is the time to test the Nichiren faith and practice and take the ninety day challenge. In our Sangha, there is no concept of "pre contractual solidarity"* that will keep you bound to the organization regardless of actual proof. You can just walk away.
If you have been chanting for something for months or years and haven't realized your goal, you owe it to yourself to take the Nichiren Lotus Sutra Buddhist ninety day challenge. You will have to un-enshrine your SGI Gohonzon and embrace the same faith as Nichiren.
When you are ready to practice the Lotus Sutra as Nichiren Daisonin details you have no choice but to lower the banner of your pride and change your allegiance. I can not promise that you will not be exiled and persecuted and you will not find yourself living in a hut without heat and hot water but I can promise you Supreme and Perfect Enlightenment.
*From A Neo-Durkheimian analysis of a new religious movement: The case of Soka Gakkai in Italy by Carlo Barone