If you know where she went (or the general area) I would let the collection agency and whoever has a warrant know. If you want to be nasty, send a letter to the local congo and their congo as well that you are being harassed for her debts and that the law requires them (if there is a warrant out) to turn her over if they know where she is.
Let the debtors know that you can't help them and give them the information of the OoBoE of their congo but they of course will claim pastorial privilege.