you really need to ask your lawyer. it depends on the reason they didn't know of the hearing. unless they have a substantial reason they didn't show their burden to show you should not be appointed will be greater because they did not show. without knowing the reason for not showing its not possible to give you even a guess as to what the judge will do.
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You need to ask your lawyer (if you don't have one, get one yesterday!) The issue may be whether you gave proper notice of the hearing to her and her lawyer.
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If they did not get notice as required the judges order should be set aside and they will be able get a new hearing. I had one like this where the court claimed they mailed notices but only two out of six parties got notice.