Will Sprint honor their online promotional code discount?

When my T-mobile contract finally ended in December, I took the opportunity to switch networks. I found a decent deal on Sprint along with a great promotional code that gave me an invoice credit of $50 per line (over 2 months). I received my first bill this week, and the discount wasnt there.

I called Sprint customer service (*2), and after 4 times being disconnected while I waited on hold, I talked to Mark, who "escalated" the issue and told me while they won't cant add the credit to my already posted bill, they will apply the credit to my next two bills. I guess I have to trust him. Will followup next month if it somehow gets forgotten.

Update: 1/27/09. My 2nd statement should have been posted by now, so the 3 CSRs I called today have told me. Buy yet it hasn't. I finally was transferred to Barbara in Sprint Customer Finance who again told me it should have been posted, and they wont be able to see if the credit was applied until it is posted (seriously?). She did drop the casual "It doesn't look like it has been applied" line, which of course did not settle well with me. I verified this whole promo discount was in my customer notes, which it was. So now I just have to wait and see. Not a great customer experience so far.

Update: 1/28/09. My bill has yet to be posted even though the cycle ended 5 days ago, but my new balance has been posted, and surprise, it does not reflect the promo code discount promised. I called Sprint Customer Finance back and this time talked to Tammy, explained the whole darn thing over again, and she spent several good minutes in silence reading the notes on my account. After reading it all, she asked to put me on hold. This is where it took an unexpected turn... after a few more minutes later of awkward silence on hold, Tammy came back, apologized for the delay, said the credits probably weren't posted because they would be more than the bill total (huh? So how would I ever get them?), but that they will combine 2 month's of credits onto my account immediately -- so instead of a $100+ bill this month, I don't owe anything and have a credit left over already applied to next month's bill. *THAT* was great customer service, Sprint!