If true faith can be recanted, then it is also must be true that that unbeliever will not be in heaven because no unbeliever will be in heaven.
If true faith can be recanted, then it must be true that one can willingly abdicate their justification, mustn't it? The only verse I can think of that would apply would be hebrews "crucify to themselves the son of god afresh....no more sacrifice for sin."