The house was shown by the property manager, but it was not negotiated at my price. Another aunt helped me negotiate and the property manager asked for an agency fee.

If you don't sign an intermediary agreement, you don't have to pay, which has nothing to do with the property. If they insist that you pay and ask them for an intermediary agreement, they can't come up with it.

In addition, the property threatened not to handle the water and electricity charges, complained to the property management department of the local housing authority, and reported to the famous property company in the community. They will be happy to do this kind of business for you and will severely punish the property management company. Of course, it is best to communicate with the property before doing so, and they will weigh the pros and cons.