Got the following email from Calista. Maybe others who didn't get their bonus miles might want the following phone number:
Hello Mr. jmartin,

Thanks for your e-mail.

Please contact the Mileage Plus Dining program at 1-800-555-5116 to have
this bonus re-submitted to your account.

Thank you for choosing United Airlines Mileage Plus! We appreciate your
business!

Calista