How to block strangers on Zalo for iPhone and iPad

We used to know how to block friends on Zalo for Android. With the iOS version, you can do the same, but there will be differences that we need to pay attention.
We used to know how to block friends on Zalo for Android. With the iOS version, you can do the same, but there will be differences that we need to pay attention.
You are constantly annoyed by Spam messages, each time you feel very uncomfortable and frustrated. What should I do? Is there any solution to overcome this situation?