Disappointed in lack of service

I was interested in a double phone contract that was advertised in Vodacom's brochure. This promotion was ending that same day so Ewald told me he can't trace that offer on his computer since there was a new brochure with new promotions starting the next day, but that this double phone contract will be continued in the new brochure and he assured me that it was by far a much better deal. I went back the next day, fulled in my application for this new contract and waited for his call. He said it wouldn't take long since I already have a contract with them. It took a week and in that time he did not contact me even once. I had to pop in there to find out whats going on Monday after phoning earlier that day. He said vodacom was busy switching my prepaid cellphone nr so I'll be able to keep it, which is what I wanted. We phoned again yesterday only to hear from another sales Lady that these particular phones was discontinued! And she was surprised that Ewald didn't mention that. I was told to wait till next month to see IF there will be another deal like that.