Message for Benjiesmum: You are being abused, and bullied. Have you got a friend or family member who can be there when this person comes down? if she does come down, don't open the door, if you have made it clear that you don't want a visit. Never give anyone your bank card or details. Completely agree with Alchemilla's advice. If you are being threatened the police would visit, possibly a PCSO who would support you.
Struggling with my 29 year old daughter's breakup

. I don't think she, or any of her visitors, will be using my drive again!