The same exact thing happened to me. I saw the promotion online, but for some reason their online checkout was not working properly. Therefore, I had to call a representative from AT&T to order the service. I made it very clear that I ONLY WANTED TO SIGN UP FOR AT&T BECAUSE OF THE $100 REBATE. There were other companies I was considering and the rebate was the only thing that set AT&T a part from the rest. The rep. reasurred me that I would definitely get a $100 rebate (I signed up for the elite internet package only).  

Unfortunately I trusted the rep. and thought I would be sent a $100 visa gift card in the mail. However, I never received anything. So I called AT&T today. Unfortunately, Tina, could not help me with the rebate because I did not "qualify." I asked her to look at my file to see if there were any notes concerning the rebate due to the failed internet purchase and my decision to call to order the service. She said there was nothing there. So I asked her to retrace my phone records so that it will be made clear that I was told that I would receive the rebate of $100. She then told me that she would submit the request but she could not gaurentee anything would come of it and if I would like she could credit my account half the price of the modem today only. Really?? I then asked to speak to a manager and she told me she already put the request in so I now have to wait to see if they can retrieve my phone record. 

Basically AT&T lured me in with a deal and then continued to lie and decieve me. With that said, I am happy with the service I now have (eventhough it took over a month to get it once I ordered it), but I will NEVER REFER anyone to AT&T if they cannot live up to their word. Unfortunately, I do not have high hopes, as I have read numerous complaints on various websites concerning this issue. It is very disheartening to me that this has happened; I really thought AT&T was one of the better providers available.