How do I fix unsorted columns on excel?

I have a column of last names as well as a column of credit card numbers..for some reason both of them are sorted at the same time so that the numbers do not match with the last names..how do I unsort the numbers column so that they match the last names again?

I don't know of a fix for that one unless you have made no changes or saved since you did the sort. If you have not made changes or sorts since then, do to "edit" and click on "undo" If you are still in it or did not save it, just close it out without saving it and then reopen it.