I'm sorry for the inconvenience caused by the unexpected circumstances. My apologies for the inconvenience this may have brought about. Please accept my sincere apologies for any inconvenience you may have experienced. Regrettably, we are unable to meet your requirements at this time. Apologies for any disappointment this may bring. Sorry for any trouble you may have arisen. I apologize if there was any misunderstanding in communication. Kindly pardon me for any actions have caused disruption. I get it that this must be frustrating. Apologies for any inconvenience this may have elicited. Rest assured that we are doing our best to solve the matter as quickly as possible. I sincerely apologize for any inconvenience you might have faced because of this circumstance.