Excuse me, is Xi 'an Qujiang Dahua Shi Jia Phase V house worth buying?

Bought a three-phase existing house. When I checked the house, I found that there was no sewer pipe in the sink in the dry and wet areas. The property manager said they had to have it repaired and found a pipe from the top of the downstairs. They waited for a long time. At first, they said to wait for the host downstairs. Later, they said that the owner downstairs disagreed. Later, after three or four months, when they checked the design drawings, they said that the sewer pipe was not designed by them, so they left it alone. From the developer to the owner, they kicked the ball at each other. Later, they agreed that there was no such thing on the design drawing, and they were only responsible for explaining it. I also charged the property fee since my mortgage. The key point is that the boss who went to their property department last week called two other department managers to take the drawings to the scene and said that there were pipelines on the drawings, so they repaired them after the Mid-Autumn Festival, and today they said that there were no pipelines on the drawings. So they don't care, buying a house is really annoying. Therefore, it is recommended to be cautious and irresponsible in real estate.