What should the property service company do if it violates the service contract?

First of all, ask for rectification in writing, and refuse to pay the property management fee without rectification in writing!

Secondly, write a letter to the owners' committee, demanding to bear the liability for breach of contract of property management fees. If not, you can sue the owners' Committee!

Finally, the property company can demand to cancel the property service contract and return the unjust enrichment on the grounds that it cannot fulfill its contractual obligations!