OK well I'm a LL for my sins and have been so for some 20 years now. In all that time I think I've just had one troublesome tenant she was simply nuts bless her;!. As to access never a problem there either, i have the keys i do a lot of the maintenance myself excluding gas have a very good engineer for that, I communicate things and issues to them. I keep them informed. What I do not do and will not do is to let a Lettings agent in the way!
On a local newsgroup there are more complaints about them and their practises then most anything else. No need to have them I can do all that they can without the grief and costs that seems to go with them.
Access for re letting?. Not a problem there as one of our places is very long term they've been there 10 years, the other a young single mum and child shes a damn hard worker has been late with the rent a few times but she tells me if that's to happen the others let to young people mainly medic staff they if one moves out invariably get a replacement all good there too.
Take pictures once a year and give them copies too so we have some visual evidence of the state of the property but all in no problems. Except one lady who moaned about the fact there was a burn mark form a smoothing iron. Went to all the expense of changing the carpet and moving her stuff out what happens?, barley Six months later she does the same thing with another Iron! That came out of her pocket that only fair!
Keep them all on a "friendly" basis but not too close in case push does come to evict but never been there yet. Check and vet them myslef and a bit of that is intuition ;) Treat them like humans just cos they cant afford a deposit and mortgage does not make hem second class citizens there's no shame in renting these days. It is their HOME something that's easily forgotten
As to the OP?, well your LL should not have moved your stuff around OK i have done that but its only to access something like a radiator and not just for the fun of it or otherwise!. As to your money grief well you could call her bluff but if she has your deposit then shes got one over you and if you want to rent elsewhere then the one your renting off will want a referewnce and well that could go wrong. Suggest you keep at shelter for advice on that one .
sad situation but if she'd managed that better it wouldn't have come to that!.
Treat us LL's with a bit of care after all the FRICS says that more rental property is needed;!