@hpatel Thanks for your reply. I'll do that next time. It would have been nice to add this to the text they send (similar to the unsubscribe link for emails) I believe this is actually a legal requirement. Better still, don't send messages to start with, and let people opt in first (this is also a legal requirement for email newsletters, if not best practice).
@sebastianbd I don't know really, the text comes from 7245. In the app there is an option to disable notifications, which I did but I still get them. Anyways, will pm you my number and appreciate your help