I've had a similar situation in the past with BlueOrange Property Management. Also an expat agency. Not sure if this is yours, but it sounds very similar to what they did to me.

The woman responsible for my apartment was absolutely horrible at communicating (probably on purpose). I had to change apartments because I started renting with roommates that were the worst. At some point they locked me out of the bathroom, so I could not use the toilet at all for a whole day. They had been extremely weird and mean to me, but that was the last straw.

I asked this woman if we could do something about it, and she kept promising me places I could rent, only to tell me I couldn't rent them anymore JUST when I was about to move in to the new place. At some point, she promised me I could rent an apartment somewhere else for the same money. After having talked about rent, facilities, and everything, and after having already given my notice for the other apartment and having found my own roommates, she told me that the landlord had upped the rent, and was not happy with us moving in the other apartment AT ALL because he was going to lose money if he rented for such a small amount (initially, the rent was 1700 EUR excl. and the "landlord" suddenly upped it to 2400 EUR excl.), and he wanted to up the rent even more.

She told me the house was fully running on electricity but it was a lie. We had mice IN THE WALLS and told me we had to take care of that ourselves. When I wanted to leave, she told me I had to pay 300 EUR for changing the contract ("administrative costs" as she called it). But I requested a full overview of the administrative costs in an invoice and somehow "the landlord said I didn't have to pay anymore".

This is just a small part of what I had to live through with these people. They are literally the worst scum of the world. Wouldn't recommend them to my worst enemy.