Bad business practices

I didn't sign up for value added services from Hotspotter and Phonebox and I want them immediately cancelled with immediate effect. Their ref. numbers are for Hotspotter RD ********** 1-1 and Phonebox ref. is RD ********** 1-5. Your assistance will be highly appreciated. This is a trick from Yellodata. I only signed up for the 2.3Gig per month for R89.00.