Each month I receive a text message saying my gas account is due to be billed and that I can provide my meter reading by clicking on a link provided. It also states I can opt out of receiving these text message (which I desperately want to do), by clicking on another link provided, however, the link takes me to the home page of the AGL website. I have searched everywhere on the website for an 'opt out' section and can find nothing. I searched through my account and profile details and nothing. I even manually put in the link provided into the browser, and nothing. How do I opt out of receiving these texts?