Just call yourselves what you are, Mormons, period, the followers of a false prophet named Joseph Smith.
Many heretical groups of whom Mormonism is in alignment with tried to call themselves "Christian" too, but found out upon death, just as Mormons will, that they placed their faith in a false god and a false jesus who can neither save nor ever existed.
But for them it was too late, but it is not for you, if you renounce Joseph Smith and the false religion of Mormonism and trust in the True Christ of the Bible and historic Christian faith.
“Many heretical groups of whom Mormonism is in alignment with tried to call themselves “Christian” too, but found out upon death, just as Mormons will, that they placed their faith in a false god and a false jesus who can neither save nor ever existed.”
Oh, so you’ve take a little trip to the afterlife and back to see the fate of dead Mormons?
It is not too late for you to accept and follow God’s chosen prophets instead of rejecting them, and by extension rejecting Christ who called and sent them.