Apple / T-Mobile trade-in promotion

Has anyone had an issue getting the T-mobile bill credits for the trade-in promotion? I got the Apple trade-in credit but received no code or instructions on how to claim the T-mobile bill credits. T-Mobile customer service agents do not seem to be aware of the promotion, and I have had no response to my mail. I realize this is more of an issue with T-Mobile but I thought Apple and this forum should be aware if T-mobile are not honoring the promotion which even now continues to be offered on Apple's site:

"(i) Apple instant trade-in credit and (ii) an additional $200 back in bill credits on your T-Mobile/Sprint rate plan."