Is this property management company legal?

The preliminary property can be decided by the developer. In other words, your current property is legal before the contract expires. However, if the property service contract concluded between the owners' committee and the new property service provider takes effect, the original property service contract will be terminated.

With regard to property fees, property service enterprises shall set prices and provide services in accordance with contracts and relevant agreements. So I think the behavior of the property company is illegal.

Regarding the refusal to pay the property fee, the owner shall not refuse to pay the fee just because he does not enjoy or need to accept the relevant property services.

To sum up, it is suggested to set up an owners' committee as soon as possible to replace the property. If the property refuses to adjust, you can bring a lawsuit to the court.