Perhaps if you sent 2 letters there would have been 4 responses.
Call and ask for customer relations. You can say "cancel my phone" during the voice prompts and you'll get there faster. Again, it may take a few calls, but you may not qualify unless you have a $30+ monthly voice plan (voice alone, with no added features).
It's possible that you were given a rebate form as a sales technique. That's a good argument if customer service says you don't qualify: the store promised it. Then they can credit you, and do a clawback from the store.
I thought there is no 50 dolllar rebate on the iPhone even on upgrades? Can anyone say for certain that you do, cause if so i shall be getting one of those rebates asap and mailing it in.
My upgrade credit of $50 appeared on my bill on my cycle date of the 13th of August as a "Local Airtime Credit" so yes there was a credit.
What made it extra sweet, for me anyway, was that I called them a couple weeks ago when they stopped charging the HUP premium and asked for a credit on the $125 extra I paid for the 16GB model. He intended to credited the whole amount on the spot and I even reminded him about the $50 credit and the agent stated he didn't see it pending so he included that in the credit. End of story was my 16GB phone went from costing me $424 to only being $249!
Aug 06 Credit:Hardware Upgrade Charge -519-XXX-XXXX -125.00
Aug 13 Credit:Local Airtime Credit -519-XXX-XXXX -50.00