Amazon Return Instructions Never Received – Need Printer-Free UPS QR Code

I am writing regarding an unresolved issue with an Amazon order that has now taken more than five hours of my time and is still not resolved. I called Amazon customer service and spent about 30 minutes on the phone about this problem. I clearly explained that I do not have a printer and therefore cannot print a return label. The representative told me that they would send me instructions by email and text message so that I could return the items without needing to print anything, but I never received any email or text, even though they said it was sent. Because of this, I am still unable to return the items. I am requesting that Amazon send me, without further delay, a usable solution for returning these items, such as a QR code or any document or code that I can simply show at UPS so they can process the return without needing me to print a label. I expect this to be handled quickly and without requiring me to spend more time repeating the same explanations.