Hanging Wire

Hello - 

There is a wire that has come loose from its restraints due to the super windy weather recently. It's not interfering with vehicles or people as it is installed very high. However, it bangs against my windows when windy and three wiring doesn't seem secure at all and might fall/lose more restraints. Can someone please help with this? I have been unable to reach the right department on the phone. I can provide pictures and an address. 

Thank you