Vikas

Hello I have a 2017 Reg BMW X3 Parking sensor keep bleeping when it rains even though there is nothing in proximity (see photo) I took it to BMW and they say there are no faults logged and there is no active fault so they cannot do anything about it. I complained to BMW customer service and they say the same. They don't accept the photo as evidence of the problem. What do I do? I'm thinking of taking them to court