I'm sorry for the inconvenience caused by the unforeseen circumstances. My apologies for the disruption this may have brought about. Please accept my deepest apologies for any inconvenience you might have encountered. Regrettably, we are unable to meet your requirements at this time. Sorry for any letdown this may cause. Sorry for any inconvenience that may have arisen. I apologize if there were any confusion in communication. Please forgive me for any actions have caused disruption. I get it that this must be frustrating. Sorry for any inconvenience you might have caused. Rest assured that we are working to solve the matter as quickly as possible. I sincerely apologize for any inconvenience you might have faced because of this circumstance.