Occasionally Bixby voice would dial out to a specific contact when I did not answer any incoming call. I did a full factory reset but continued to have this problem. I decided to try stopping Bixby Voice from interacting with my phone but did not find any relevant answers online. I believe I have found a way to do that and want to share it with you. If you go to Apps/Samsung app settings/Bixby voice/Leave Bixby you will be able to stop Bixby Voice from interacting with your phone. According to the prompt it will take about a week to leave Bixby. After waiting seven days I went back to the Leave Bixby section and clicked OK at the prompt. Samsung approved my request and now I no longer have random contact calling. I hope this will be helpful to those looking to leave Bixby since I have not found any reference to this solution anywhere online.