Thapelo L

please help

This company calls me on pretense of offering me a cellphone contract, which I am looking for so I gave them my details so that they "could find me a good deal" which they never did get back to me with. Then a few days later I received an SMS saying Ive been subscribed to United connect so I googled it to see what it was about. So I realised its not a service I will ever use so how do i cancel