I purchased an iPhone 13-mini from Backmarket. I tried to move an existing line to this phone. It worked initially, but the line was suspended. After several phone calls with customer service and technical support I was told the IMEI was blacklisted. I contacted Backmarket they said it was clean and I checked at https://www.imei.info/ , the IMEI came back as clean. Is there a process to get my IMEI off of Vezion's blacklist?
thank you