Abusive Neighbours, what is the right steps to take

Marie from Howick

Can someone tell me if you are threatened by your Neighbours what action can be taken, yesterday my Neighbour asked me to move my cars because she wanted to park where they were, however she has her own driveway and garage on her side of her house but because our driveway is closer to her door she wanted to park in our driveway.
Anyway, long story short she became abusive even went as far as to call other family members to come the property and block me from getting in my own driveway. I was approached by several people yelling abuse and threatening me. Due to the threats and abuse I did call the police and had them all trespassed. After the police left, they began threatening us via Facebook threatening to drag me and my daughter and beat us, how they eat people like me for breakfast etc., many disgusting messages.
I forwarded a couple of the messages to landlord and put in a complaint regarding the abuse.
I have since contacted my landlord who has said she has had a chat with the tenant and told her not to abuse me again or she will breach her, the landlord will not take my calls but only emails and I don't believe a chat is sufficient given the situation and the ongoing threats, I don't feel safe even coming and going from my house.
It's my understanding that the tenancy manager has an obligation to us as her tenants and I think a chat will accomplish little with these people.
I am at a loss of what to do from here any helpful information will be much appreciated.