Cannot get the $100 credit from Refer to Friends Program as advertised

Back in August 2011, I set up a new account with Direct-TV using the REFER A FRIEND ADVERTISED OFFER using the friend's acct . Both accounts are supposed to receive a $100 credit. I have called DIRECT-TV every month whenever I get my new statement asking about my credit. Every month I have to go back through this long story and hear the latest excuse. The first few months, it was because it would be credit on the `next bill'. The next month when I call, they said I hadnot given them the referral number, which I am positive that I did more than once. The next month, I was told that you had the wrong account number and it would be fixed. The next month, I asked for a supervisor and was assured that the credits for both accounts were in the works and would appear the next month. GUESS WHAT???? NO CREDITS AGAIN.  In despiration, I listed the problem on your Facebook page to let people BEWARE of this offer and twice I have tried to contact DIRECT-TV through their website. I have also contacted the BBB about this...going on 6 months now.