I'm sorry for any trouble caused by the unforeseen circumstances. My apologies for any inconvenience this may have caused. Please accept my sincere apologies for any disruption you might
have encountered. Regrettably, we are unable to fulfill your request currently. Apologies for any letdown this may cause. Apologies for any inconvenience that may have encountered. I'm sorry if there was any misunderstanding in communication. Please pardon me if my actions have caused any inconvenience. I understand that this must be annoying. Sorry for any inconvenience this may have caused. Please be assured that we are working to resolve the matter as quickly as possible. I sincerely apologize for any disruption you
might have faced because of this
circumstance.