I'm sorry for the inconvenience caused by the unexpected circumstances. Sorry for any inconvenience this may
have brought about. Kindly accept my deepest apologies for any disruption you may have experienced. Regrettably, we can't to fulfill your request at this time. Sorry for any letdown this may cause. Sorry for any inconvenience that may have arisen. I'm sorry if there was any
misunderstanding in communication. Please pardon me if my actions have brought about
any inconvenience. I get it that this may be annoying. Sorry for any inconvenience you might have elicited. Please be assured that we are working to resolve the matter as quickly as possible. I'm truly sorry for any inconvenience you may have faced because of this situation.