We can definitely provide you with some information about blocking these unwanted text messages. You can Learn how to block unwanted calls and text messages here. You can also Report unwanted calls & texts by sending these text messages to 7726 (SPAM) so that we can start an investigation. Messages forwarded to 7726 are free. They don't count toward your text plan. Let us know if you have any further questions or concerns.
Sean, AT&T Community Specialist
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