If you want to stop messaging with another user, you can block them. After that, you will no longer be able to chat with them, but you will still be able to transfer and receive Evers in Surf Chat.
There are two ways to block users in Surf:
Block user via chat settings
Open the chat with the unwanted user.
In the upper right corner, tap the settings icon.
In the upper right corner of the pop-out window tap ⋮
Quick block with a button in the chat
In case it is the user who initiated the conversation, after the chat is opened, you will see Block button at the bottom. Just click it, and the user will be blocked.
If you want to unblock a contact in Surf Chat:
On the main screen of the application, tap the desired chat.
On the chat screen, tap the settings icon in the upper right.
On the contact details screen, tap ⋮ at the top right.