Got Subscribed to YD games. I did not op into for this

I recieved an sms on the 17/09/2018 at 6:38PM and again at 7:23 confirming that I have been subscribed to a service called YD games that will cost me R2 a day - Then on 18 sept 7:21 AM that my 1st day free access has expired. Now I know I did NOT sign up for this service.

How does dis happen