Hi Ryjaja I think you must be a man.....
This happens a lot even to anglos - and you have to live with it.
I am pretty sure there doesn't have to be a fear of violence
and
yes there can be harassment without a fear of violence as it is defined as a course of action intended to cause distress.
I don't think you have chalked up a PIN - a police information notice - and it is galling for you to have a request for the return of your belongings taken as a course of action intended to distress.
I would write to the person who has the belongings
and tell them you want a friend to call around to collect them.
It should be a registered delivery letter and let them set the date
yes I know there is a possibility they will hang on to your stuff.
In American you can get a policeman to go around with you but that course of action is not open to you in the UK
In the UK it is subjective for the victim - how they feel about what you said and not objective in that you can say I meant this and that
Your citizens advice bureau may be able to help with advice
Once you get the idea that you can phone or go round
but you have to write the whole time
things will be more straightforward
start here
http://www.adviceguide.org.uk/wales/discrimination_w/discrimination_taking_action_about_discrimination_e/ge30_taking_action_about_harassment.htm