I'm sorry for the inconvenience caused by the unexpected circumstances. Sorry for the inconvenience this may have brought about. Please accept my deepest apologies for any inconvenience you may have experienced. Regrettably, we are unable to meet your requirements currently. Apologies for any letdown this may cause. Apologies for any inconvenience you may have arisen. I'm sorry if there was any confusion in communication. Please forgive me if my actions have brought about any inconvenience. I get it that this must be frustrating. Sorry for any inconvenience this may have caused. Rest assured that we are working to solve the issue as quickly as possible. I sincerely apologize for any inconvenience you might have faced due to this situation.