I apologize for the inconvenience caused by the unexpected circumstances. My apologies for any inconvenience this may have caused. Please accept my sincere apologies for any inconvenience you may have experienced. Unfortunately, we are unable to meet your requirements at this time. Sorry for any letdown this may cause. Apologies for any inconvenience you may have arisen. I'm sorry if there were any misunderstanding in communication. Kindly pardon me for any actions have caused any inconvenience. I understand that this may be frustrating. Sorry for any inconvenience you might have elicited. Please be assured that we are doing our best to resolve the issue as quickly as possible. I'm truly sorry for any inconvenience you may have faced because of this situation.