Well, Plailect seemed to have a solution for you, I guess you should try and get in touch with him.
This is fixable, but you will need a hardmod and the OTP that you used for the install. If we also know what FIRM version you started with (I'm assuming 9.2, correct me otherwise), then we can do a plaintext firm attack to swap the FIRM in NAND since we know what payload you installed.