Nursing home said that they would replace lost hearing aids but now are not talking to us?

The nursing home put in writing that they would replace the hearing aids. We have no how or when aids and clips were lost. Nursing home was supposed to put in and take out and store aids. In fact, the hearing aids had a clip that was to be attached to my moms clothes so that they would not be lost. The staff was to be trained about using clips. My mom could not undo clips because of her bad arthritis. Thus it is the negligence of nursing home and they should replace them.