have the police given a time for the money to be payed back by?
Well, we don't have arrest or prosecution on demand in the UK. We never have. There are lots of reasons for it. It is a principle that protects us all.
I haven't heard their account for this obviously. On the face of it, it does sound as though an offence has been committed and they should not be refusing to investigate. Probably the truth is that they don't have the resources because they are too busy investigating reports of relationship squabbles that we euphemistically call domestic abuse or complaints of a low level sexual assault one hundred years ago which are apparently more important than proper crime.
Can I clarify anything for you?