File a complaint here. Takes about 2 mims and can be submitted online. The more complaints they get about 347 spam texts, the better it will be. It's a hassle I know, but if you answered the test with STOP, ( as I did ) then I'm afraid you've just set yourself up to get more spam.
This Number keeps Txting me. I have recived 4 txts from this number each of them say reply "STOP" to not receive these any more and i do yet i am still receiveing them. I even got one that said you have chosen to Stop receiving these messages. To bad for you. you have lost out on a good chance at $1500.00.