The property management company has changed. Can the late property management company charge the early fees?

From a legal point of view, the new property can sue you for this (because you must have signed a property management contract when you bought a house, and there is an agreement between the old and new properties you mentioned). Of course, if you can prove (legal and valid evidence) that the old property did not provide services according to the contract requirements, you should be able to reduce some property fees.

I think you can negotiate with other tenants and send representatives to talk to them about the previous property fee reduction and exemption, and the new property will not offend the owners for these old debts.