Just wait awhile and try again
It happened to my friend's mom as well. The first couple of times she attempted, her application was denied. They waited for about 6 months or so and then applied again. This time, they were trying to come up with all sorts of "strings" to pull but in the end, none of it were required (I doubt they would have worked anyway). The consular approved her application without a single question (I guess she had to appear in person).