Help : What kind of lawful action can be placed against me?

You have to go to court and legally evict her. If she left her property in the house you are responsible for it. If anything happens to them she could sue you. If after you have legally evicted her then you can claim the property as long as you can show proof that you have attempted to contact her to get her belongings. And just to let you know you can not hold on to any property of hers because she owes you money. That is illegal to.