I apologize for any trouble caused by the unexpected circumstances. My apologies for any inconvenience this may have brought about. Please accept my sincere apologies for any inconvenience you might have encountered. Unfortunately, we can't to fulfill your request at this time. Sorry for any letdown this may bring. Apologies for any trouble that may have arisen. I'm sorry if there was any misunderstanding in communication. Kindly pardon me for any actions have caused any inconvenience. I understand that this must be annoying. Sorry for any inconvenience you might have elicited. Rest assured that we are working to resolve the issue as promptly as possible. I'm truly sorry for any inconvenience you might have faced because of this circumstance.