Xfinity will not provide a working unlock code

10 days ago I started the process of porting out a line to another carrier. The phone was paid for and met all requirements to be unlocked. Yet, it was still locked. A dozen phone calls and 7 wasted hours and the phone is still locked. I was given an unlock code that doesn't work. I have tried everything suggested and all I am told is that the code is valid and SHOULD work. I need a working code without any more runaround. ESL05183458.