i suppose the 1st step would be to discuss with the landlord. i am sure somewhere in the tenancy agreement it is stated that she will not cause a nuisance to others.

if the landlord is being unreasonable, your next action would be to sue the landlord. you should also take photos of the rubbish etc. just for proof.

if you just want to give her a scare, i would tell you to call the police. but something tells me not even the police can scare this woman.