When I got the key to the renovation of the new house, I found that the threshold of the house was severely flattened and there were many signs of water leakage on the roof. What should I do?

In fact, you can directly find the general manager of the property, explain the situation and strongly ask him to solve the problem for you. Their basic job is to serve the owners. You can threaten not to pay the property management fee and see if he will handle it. I often use this trick and it works well. I must be strict with my property. I hope it helps you!