I got a note from eComFax Customer Service saying the port request was rejected.

Find out the reason for the rejection indicated in the note that the customer received. 

For the following rejection reasons:

• Wrong Person Authorized LOA
  • Ask the customer to check with their current provider and ask them for the Customer Service Record (CSR). That form will have the current “authorized” contact in their company.
• Wrong Billing Number
  • Ask the customer to check their current bill carefully and make sure they’ve provided the full billing number (which often has more than 10 digits).

See additional reasons for a port rejection.