Vodacom not delivering as advertised

I recently got my first ever data contract. It is advertised as a 24 month top up deal with 5GB day and 5GB night data, a router and some free goodies. I received everything except the top dog voucher. Checking online I saw the 5GB anytime data, but not the 5GB night data. Made a call and the consultant told me you don't get night owl data on top up. I said well that is what was advertised and what I signed up for. I sent her a screen shot of it and she then informed me that Vodacom had to give me the data as advertised or 10GB anytime, otherwise it falls under false adverti*****t and is against the consumer protection act. She escalated the matter. Since then I have had numerous calls telling me you don't get nigh owl with top up. I've already heard that, but I was led to believe you do, I've never been on a data contract to know otherwise. All Vodacom is offering is to switch me to an open line contract with the night owl data included, no other solution. I don't want an open line as they always end up costing more. I just want what was advertised. To top it all of, I was billed incorrectly as well. I have 7days left of the 14day cancellation window, sort it out before then.