1️⃣ Head to the Chat tab to access all your chats.
2️⃣ From your chat list, select the person you want to block.
3️⃣ Once selected, look for the three small dots on the top-right corner of the screen, click on it and choose the ‘Block’ option.
PS: You will have to unblock the person first if you want to send them a message again. 🤓