I am absolutely livid and would really value some cool-headed advice. DP and I are between properties (long story) and have had to take a short term rented flat until mid Jan. This is costing us five hundred pounds a week.
We arrived at the flat last Thursday as arranged, to find that the flat is full of the landlady's stuff. The fridge and freezer were full, the kitchen cupboards were full of food, the bathroom cabinets were full of toiletries, medication etc, the shelves in the living room were full of books etc and there is a frigging bike parked in the (very narrow) hallway!
We got straight onto the letting agents who said they were told by LL that all that stuff would be shifted prior to our moving in. Well it wasn't. We've spent all weekend living out of boxes as we can't unpack properly. We are both stressed out of our minds as it is, this is driving us utterly crackers.
And the latest is that she is prepared to come round and shift her stuff, but 'can't' do it until next Tuesday. That's a whole other week of tip-toeing around someone else's stuff. The cheeky cow. I've told letting agents that no, that is not acceptable. We have already chucked out all the food we don't want, but I really don't think we can chuck books and a bike. And frankly I've done quite enough of cleaning out someone else's flat already 
We have paid all the rent upfront so have nothing to withold. What do we do next???? At our wits' end.
Thanks for advice in advance