Not happy with vodacom

I was Phoned by a Sales person which gave me an amazing sales pitch and said the migration would take affect from the start of the new month, but if I feel at anytime to cancel it before that time I can do so. 4 Hours later and no luck, now I have to wait till it takes affect and then cancel and wait I will be liable for a penalty. Non of that was relayed like that to me . What is the use of those recordings they take. To be held against you but not against themselves?