Sorry to hear of your troubles JJJ, If I'm reading this right the
owner/s of the property you used to live at was happy enough with the
ongoing buisness arrangement you had with them
(through there agent ) to let you lease another property they own ?
I wonder if the hassle your having now is more to do with there agents poor property management than anything you have done ,particularly
if there absent landords or are completely reliant on the agent to fully manage all aspects of there properties . In my experiance of 30 years of renting , (

, ) most poperty owners are pretty reasonable one on one , I have very mixed experiances with property managers though , the most common reaction to any interaction with them is an almost complete reluctance to undertake any preventitive work on the properties they manage .
As your still tied up in this exersise for now would it be possible to get the contact details of the owner arrange a meeting with them ... and there agent to try and mediate some sort of outcome ?... I'd at least ask to maybe glean some sort of idea whos really on your case ,somtimes it isn't the owner at all , sometimes its both.
good luck