Originally Posted by
Boing_737
Try sending STOP in reply to those messages. Their system should be setup to react to that message and stop sending you SMSs.
BTW, that should work for any text messages that arrive on a subscription basis e.g. if your kids have tried to get the latest frog ringtone, inadvertantly subscribed to one of the ringtone pirates and had all their credit taken taken up with unsolicited ringtones! (I think that made sense - first day back at work etc.)