I apologize for the inconvenience caused by the unexpected circumstances. Sorry for any disruption this may have brought about. Kindly accept my sincere apologies for any inconvenience you may have experienced. Regrettably, we can't to fulfill your request currently. Sorry for any letdown this may cause. Sorry for any trouble you may have encountered. I'm sorry if there was any confusion in communication. Please pardon me for any actions have caused any inconvenience. I understand that this must be annoying. Apologies for any frustration you might have caused. Rest assured that we are working to resolve the matter as quickly as possible. I sincerely apologize for any disruption you might have faced because of this circumstance.