ATT Next Every Year return phone label never created

Hello,

I preordered 5 iPhones from Best Buy this year. All 5 iPhones were available for pickup on release day.

At the register for pickup, none of the return shipping labels printed due to an error. I did receive an email with a shipping label for 2 of the 5 iPhones, and I was able to login to MyBestBuy to print those 2 same labels as well.

For 3 of the 5 phones, I did not receive shipping labels, ever. This has been an ongoing issue since the day that I received the phones.I have spent countless hours on both chat and the phone with AT&T employees. I have been unable to return these phones through AT&T Next because return labels (RMA) were never created and provided to me. I have continually contacted AT&T on this matter, but have had little to no help. I had finally (thought I) made progress and got ahold of an employee that could help, but I was entirely unable to understand the employee on the phone. The employee called me back 3 days in a row and said that he/she would call me back the next day but I never heard back, and this was about a week ago. 

I am at my wits end with this issue. I have done everything in my power to contact AT&T for help, but every employee keeps telling me, "they do not know what happened, but good luck." I understand that "my return my device date has passed," but this was entirely out of my hands, and I have done everything in my power to try and get help from AT&T. From this experience, I am extremely beaten and frustrated... I will now be getting billed for 3 iPhone Xs Max 256GB phones that I was unable to return.

If any employee here can provide ANY help, that would be greatly appreciated. Feel free to reach out to me directly. Thank you.