My grandmother has dementia

As the title says my grandmother has dementia and things are not right at home rn. My father and mother are working but we need someone at home to be with her while they go to work. I'm not home and there will be nobody to look after her. Things are getting really out of hand as she is also turning violent at times now. Housemaids are not really ready to look after her as she is really hard to handle. We cannot also afford to have a housemaid at a very high expense. I don't know what to do. What can be done?