Rebate keeps getting denied repeatedly (everyday)

Hello everyone, 

My problem is simple yet extremely annoying  and it seems like the T mobile customer support is helpless. I switched to T mobile two months or so ago and they had a promotion of "bring your line/phone, and get $200 off per line" (upto 4 lines per account).

I ported 7 lines and applied for the rebate on 4 of the lines (as stated by the promotion). After 6-8 weeks I check the status and it says "Denied" with "no eligible/Port in found". So I called the customer support and after an hour or so of verification, the lady manually approves all the rebates. She told me that I will get a text for a virtual mastercard/visa so I should keep checking for the status. At that point I was relieved and thought it was all done. 

The very next day I check the rebate status page and  it says denied again with the same exact reason. So I called again, went through the same 1 hour of verification and the person manually approves everything and tells me to keep checking. So all good and i thought it was done. 

The very next day I checked the rebate status and guess what ? Denied again.. called again - wasted 1 hour again and got it approved - the very next day denied again.. I have called 8 times on 8 separate days and I keep running into the same issue no matter what -

Now i am extremely frustrated and I don't want to call again unless I know I can find someone who can help me. Can anyone help me or suggest a solution ? 

PS:  I just dealt with a lost phone during the shipping process on another line (separate) than these and that almost took me 1.5 months to fix. At this point I am almost regretting the switch.