Instructed to return vodacom devices

On Saturday the 25th of April 2015, I went to game store in Middelburg mall. I app**** for a vodacom contract for 2X Smart Tab 3G. I was told I qualify, was given the two devices and I payed R105 for the sim cards. I went home and on Monday the devices were still not activated. i called Malovey the shop assistant, asking her about the activation. To my surprise she told me I must return the devices because I do not qualify. This is totally inappropriate and unprofessional service. I have alredy given my childfren the tablets, and I am not prepared to return them. The shop assistant should have followed the proper procedure I am sure I was not supposed to be given the devices if i did not qualify. Please intervene and assist me. I will afford the monhlty subscribtion of R100 and have been highly inconvinienced by this poor customer service at game. Can the store please activate my devices. I did not ***** them, they were given to me and I expect the service to be completed as I require. I feel they are violating my consumer rights.