It's nearly a week now and no more spam on any of my SIMs, thanks vd! 

Truly an epic spamfail!
No, I didn't actually subscribe. The irony of the news4u campaign is I still don't have any idea of what it is or whether I'd want to make use of it. Now apparently I've been unsubscribed from the service, when all I wanted was to stop receiving multiple advertisements about it.That SMS is to cancel your subscription, but I assume you didn't actually subscribe.
Truly an epic spamfail!