Sometimes users have to face some unwanted situations while using messenger because many contacts get synced to the messenger and we unknowingly add them as a friend. Due to our privacy and safety, we have to remove person from messenger. To stop this activity stop automatic contact sync on Messenger. 

1. Open the messenger app and click on the profile

2. Scroll down and choose “Phone contacts”

3. Then tap on “Upload contacts”

4. Hit “Turn Off” and the auto-synced will be off.