Not receiving promised phone credit and denied rebate

I had the same situation and changed from sprint to mobile during the same time.  Their excuse was that the device did not arrive on time. However, the phone did get there and they kept it. I am sure we are not the only ones, we should figure out how to sue them because when I asked for my device back, I was told they can't give it back.

Sprint would always take care of me, that's why I was their customer for 20 years. I knew this change to Tmobile was not going to go smoothly.

I have scheduled an account cancellation 30 days from today.