Unknown and unauthorized

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Newbie

Unknown and unauthorized

I recently received multiple texts from boostfreemsg (9329) number since joining family plan (10/3)... stating that account ending in (multiple diff. num.) has excepted my invitation to join.... joined and left usually within a few minutes...some have taken money... one number even booted my wife and son... ive changed my pin 3x threetimes since... it's still happening afterwards... as recently as last night, maybe 10 mins. after call to care services