Need network unlock codes for the two phones on my account

I need to get network unlock codes for the two phones on my account. I tried the customer support chat yesterday to handle this, and was told that I would be emailed the unlock codes within 24 hours, but that has not happened. The two phones have been paid off for over a year, and meet the other criteria listed on support page https://www.xfinity.com/support/articles/eligible-to-unlock-phone to be unlocked.