Unlock my phone

My phone was paid in full 2022, owe nothing for phone or nothing past due on service, been customer since 2017, never reported lost or stolen & I am/was the only account holder. Moved & canceled services except mobile phone 11/2025 having to pay the additional $25 fee per month to have Xfinity mobile. I now want to change providers, have gotten transfer code, my service was canceled by Xfinity when got this, but my phone is locked & get message needed code to unlock eSIM. Spoke to 6 reps during 3 calls from grandsons phone...2 of which tell me my phone is unlocked. Spoke to tech support that tells me they cannot assist because I'm no longer a customer. A ticket was supposedly created by Xfinity mobile agent to unlock & send me code & I'm also told since have older Android I'll also need unfreeze code. I am still awaiting to get this phone unlocked. I cannot call Xfinity support because my phone isn't working. I cannot chat with support because I no longer have an account. A phone that belongs to me since 2022...and should have been unlocked within 48 hrs according to Xfinity terms & conditions...is basically being held hostage by Xfinity. Please tell my how I can get MY phone unlocked so it will work again with another carrier.