What should I do if there is water leakage and the property maintenance is invalid for many times?

You can negotiate with them after the leakage, or you can find a professional waterproof company to deal with it yourself, but the cost is borne by the property company, because they have repaired it many times and the effect is not satisfactory, which affects your normal use and life. It is normal for you to find a professional waterproof company to handle it yourself. If you figure out where the water leaks. Like a leak in the bathroom? The balcony leaks? Or is the outer wall leaking? I can also recommend it to you.