There was a storm with 90mph winds last week in my area. My eighteen year old brother's jeep got hit by a plastic playhouse that flew from a nearby business/gym. His car was parked in the lot at his work, the same plaza as a fitness center owned by the city, where the playhouse flew over their small gate and damaged his drivers side fender near the gas cap. He wants it fixed, called the fitness center and is getting the run around, the owner can't get in touch for 'two weeks'.

What steps should be taken?