Data purchase

I received the following mess today: You have no active Internet bundles. To save, buy a 50MB data bundle for R4 (8c per MB). To buy now dial *111*96#. To opt out SMS END to 100. So i decided i will buy the data. Firstly R5 went off my account and secondly the data was only for.an hour. nowhere in the message did it state that it will cost R5 and nowjere does it state it is only valid for 1 hr. I want my money back. I dont care if it is just 5 it is the principle of the matter. This is exactly why i cancelled my contract with u.