I apologize for any trouble caused by the unexpected circumstances. My apologies for the inconvenience this may have brought about. Please accept my sincere apologies for any disruption you may have experienced. Regrettably, we are unable to fulfill your request currently. Sorry for any letdown this may cause. Sorry for any inconvenience that may have encountered. I'm sorry if there were any confusion in communication. Please forgive me if my actions have caused any inconvenience. I get it that this must be frustrating. Apologies for any frustration you might have caused. Rest assured that we are doing our best to solve the matter as promptly as possible. I sincerely apologize for any disruption you may have faced because of this circumstance.