The owner didn't go through the check-in formalities, and now he wants to move in. What should I do?

Without moving in, the owner has actually been living in his own property. The property company stopped the owner's water and electricity on the grounds of not staying. After the owner reported for repair, the hydropower company came to repair it. It seems that the owner can't get the real estate license without moving in. When the owner goes through the check-in formalities, the property fee shall be paid from the date of paying the notice of check-in. Property companies have no right to cut off water and electricity. The property company informed the developer to temporarily withhold the real estate title certificate, and the developer sued the court for violating the purchase contract.