Who should I ask for the property fee! !

According to the Convention, the lessee should pay the property management fee, because the lessee enjoys the property management services provided by the property management company. Because you and landlord A have not made it clear who will pay the property management fee, personally, I think it is unreasonable for the property management company to ask you for the property management fee in 2006. The correct way should be that the property management company looks for the owner A, and then the landlord A will discuss the expenditure of the property management fee with you. Before reaching an agreement with Owner A, you can refuse to pay the previous property management fee.