You would need to go into the Group message and access all of the numbers in the message in order to block the individual contacts who're sending out the messages. https://www.samsung.com/us/support/answer/ANS00062352/
Alternatively, you can speak with your carrier to have these numbers blocked.
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.
Please note, notification emails are a DO NOT REPLY address, you must log-in on the community page in order to respond.
An Accepted Solution has been marked and provided for this thread. The thread will now be locked for further replies. in hopes to keep the integrity of the thread from steering in a non-technical manner. If you have a separate concern, feel free to post again or send one of our moderators a private message with more details. Please note duplicate posts on similar subjects starting 2/1/21, will be removed to keep our community organized and make it easier for our users to find resolutions and needed content. Remember that if you do make a post, please include as many details about your symptoms as possible. Also, make sure that your title is a good summary of the overall situation that's occurring with your product. Thank you for being part of the community!