Executive resolution concerning unlock of a replacement phone from Assurant

I have been a customer with Xfinity for many years. I purchased my current phone in 2021. In October of 2024 I had my phone replaced by Assurant due to damage. I am now changing to another carrier and neither Xfinity or Assurant will unlock my phone so that it can be used with another carrier. I was first told that the SIM card I gave them did not match the SIM card they had on file. It was later determined that the Sim had not been updated since I had my replacement phone. I gave them the past and current Sim number so that would no longer be an issue. I also gave them the claim number from my Assurant replacement . My phone was paid off years ago and my account is current. I have spent over 24 hours on the phone with Xfinity trying to get my phone unlocked. My number is already transported to another carrier. I was first assured that my phone was unlocked. My new SIM card wasn't working so I was assured that there was another layer of unlocking that would be taken care of. My phone has been out of use for 2 weeks. I am missing both personal and business calls that are very important to me. The representative that I spoke with yesterday called Assurant on my behalf and we were told that Assurant does not unlock phones. They said that when they replace a phone for Xfinity that the phone is locked too Xfinity and they cannot and do not unlock it. Xfinity says that they cannot unlock the phone and have been very secretive as to why. I have gotten two emails saying that I do not meet the criteria for unlocking and yet, I do. I have never been able to speak with anyone other than the representative that answers the phone. I have requested to speak to supervisors and also to the unlock Department and have not been successful with either of those. I do not want to buy another phone . I do not need to buy another phone. I have been told that I will have success straightening this problem out by speaking to the executive resolution Department. I would appreciate it if someone from that department would get back in touch with me. I will be happy to send you all of my contact information as well as anything you need to know about the phone in a private communication so that we can get this straightened out as soon as possible. I cannot wait any longer to get this done. It is costing me both time and money that I do not have. Thank you very much in advance for your assistance. I look forward to hearing from you very soon.