The SSL Certificate for my Domain is taking a long time to process

My newest domain (inktumn.com) has an SSL certificate processing for the past 18 hours or more. I know it can take up to 72 hours for the certificate to be processed, but usually my domains take only about an hour. Is the certificate still guaranteed to be issued, or should I refund the domain and start over? What should I do if the SSL certificate does not process after 72 hours?