Missing Rewards Card - never received $250 VISA

Hi, I signed up for TV & Internet and was promised a $250 prepaid VISA card as an incentive which I was counting on.  I have repeatedly called phone #'s, tried various different websites suggested to track down the card and get the problem fixed.  Nothing has worked so I have finally wound up here after a google search in which it appears MANY PEOPLE are having the same problem!  Can someone please help me out here ??