I'm really sorry to hear this happened. Did you buy this from the store that told you it could be returned after a month? I'm aware there's a 14 day return policy but I'm a little confused why you were told it was a month.
Good morning, magenta6725375!
We truly want to help get to the bottom of why this happened. MC asked a good question last week -- did you purchase your iPhone from the same store that told you there was a 30-day return policy? If not, please let us know where you purchased the device from. I'm so sorry this was your first experience with T-Mobile. There's clearly room for improvement and getting the right info from the get-go is a must.