1. From your case introduction, first of all, we assume that the property management company has been authorized by the owner. Otherwise, nothing can be said. Judging from the contract signed between A and the property management company, the house you rented belongs to the scope of subletting authorized by the property management company. Actually, you've rented it out. During the lease period (the contract between A and the property management company), the property management company has no right to terminate this part of the contract (with legal basis). Naturally, there is no reason to cut off water and electricity. Even if the property company has the right to take corresponding action against A, if the action infringes on your rights and interests, you have the right to raise an objection and ask the property company to stop the infringement (here it can only be infringement, because you have not signed a contract directly with the property company and have no legal relationship with the lease contract). So now you can intervene in the lawsuit between A and the property company as a third person, demanding respect for your legitimate rights and interests.

The legal basis is:

Judicial interpretation of the Supreme Court on hearing the lease contract: Article 17 If the lessor requests to terminate the contract because the lessee is in arrears with rent, and the sublessor requests to pay the unpaid rent and liquidated damages on behalf of the lessee, so as to safeguard the lessor's right to terminate the contract, the people's court shall support it. Unless the sublease contract is invalid. If the rent and liquidated damages paid by the sublessor exceed the amount of rent payable, the sublessor may offset the rent or claim compensation from the lessee.

2. According to the above analysis, the property company's water supply and power failure is an infringement. According to the provisions of the Tort Liability Law, it is natural to require the property company to bear the liability for tort damages, and the scope of compensation includes direct losses and business suspension losses. One thing to note here is that unless it is settled through coordination, the court will not allow you to intervene in the case between A and the property management company as a third person and directly judge the property management company to compensate you for your losses. Your loss needs to be prosecuted separately.