I'm sorry for the inconvenience caused by the unexpected circumstances. Sorry for any inconvenience this may have caused. Please accept my sincere apologies for any inconvenience you might have encountered. Unfortunately, we can't to meet your requirements currently. Apologies for any letdown this may cause. Sorry for any inconvenience that may have encountered. I apologize if there were any misunderstanding in communication. Kindly forgive me for any actions have caused disruption. I get it that this may be annoying. Apologies for any inconvenience you might have elicited. Rest assured that we are working to solve the matter as promptly as possible. I'm truly sorry for any inconvenience you might have faced due to this circumstance.