Promotional Trade-In Credit Never Applied to Account?

We got the same issue. We had 4 lines. Only 2 lines got the credit monthly, and another 2 lines got nothing.

We are still dealing with T-mobile on the iPhone 13 trade-in rebate. We have been calling them many times since January 2022. Every single time after the call, they said they took care of it, and the credits should be reflected to the account in a month or two. After 2 months, we still hadn't seen the credit. Then we called again, and they said it was declined. What were they talking about? When we submit the rebate, the system showed approved. Also, all 4 iPhone were purchased and trade-in the same way. Why did they only approve 2 of them?

My wife and I are so tired of dealing with them. I am almost at the point that I give up the credit, and switch to AT&T. I really can't deal with T-mobile customer service anymore. From what the accent of the representatives, they were not in US. They just read whatever showed on the screen.