Hundreds of duplicated MMS messages on Samsung Galaxy S3, how can I stop this?

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AC Question

Hundreds of duplicated MMS messages on Samsung Galaxy S3 and won't stop

My phone keeps getting MMS messages every 6-10 seconds and this has been going on for hours. I have factory reset the phone, tried clearing the caches in the messaging app, and called the person I'm getting the messages from. Nothing has seemed to work. I have at&t as a provider and I'm getting extremely frustrated about this. Can anyone help?