I blocked one contact, and it got blocked successfully. But if it's related to a group message I still get messages. How do I block group messages? Help!!
Unfortunately, you can't really block them easily. You could delete the chain but it will return. My only suggestion is to consider blocking all of the people in the group if you can. By that, I mean one by one.
If you wish to block or turn off *all* group messaging, I suggest turning off MMS (this is a hassle though). Those are the only two options I'm aware of.