I apologize for the inconvenience caused by the unforeseen circumstances. Sorry for the inconvenience this may have caused. Please accept my deepest apologies for any inconvenience you might have encountered. Regrettably, we are unable to meet your requirements currently. Apologies for any letdown this may cause. Sorry for any inconvenience you may have arisen. I apologize if there was any misunderstanding in communication. Please pardon me if my actions have caused disruption. I get it that this must be annoying. Sorry for any inconvenience this may have caused. Please be assured that we are working to solve the issue as promptly as possible. I'm truly sorry for any inconvenience you may have faced because of this circumstance.