My apologies that you are receiving these messages! I know that can be very frustrating and I will be happy to help!
What type of phone do you have? First, I recommend taking a trip through our AT&T Troubleshoot & Resolve tool! After selecting your make and model, there will be an option for Messaging under Service/network issues.
I also recommend clearing the cache for your Messages application. Clearing data should also help, although I suggest backing up your messages first so that you do not lose them.
Steps to do this will differ depending on phone, however you can usually do this by:
Accessing your Settings
Scroll to the Device tab
Select the Application manager
Scroll down to Messages
This will present the options to clear cache and cleardata
You can view all backup methods within our Device Support Center! These can be found in Tutorials > Backup & restore.
Keep us posted and let us know how that goes! Have a great day!
Fiona, AT&T Community Specialist
Need help? Ask a question to get help from the AT&T Community or support from AT&T specialists. If this reply helped you please use Accept solution to mark it as an Accepted Solution.
*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.