Prime video data not working as promised/is it a ****???

I received an sms saying that I had been given a chance to a free subscription to Prime video edition for 12 months. I followed the prompts and was delighted to receive it. I also received the 3 gig as promised. The problem is that I can't use the 3 gig for some reason. If I use another Sim card with data it works but if I use the Sim with the free 3gig the app doesn't work it says I don't have internet. Soon the 3 gig will expire for this month and I haven't been able to use it since Saturday! I tried calling the Vodacom number 082135 but as usual it doesn't give me a chance to speak to an agent. TOBI is so frustrating because when you select between options 1 or 2 he doesn't hear you and ends the call! I am at my wits end with Vodacom! But one thing I can guarantee is that someone at Vodacom will call me and help me before my data expires. That is why I am not leaving the network anytime soon because once we complain HERE someone will call, so I thank you in advance.

This is