I'm sorry for any trouble caused by the unexpected circumstances. My apologies 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 at this time. Apologies for any letdown this may cause. Sorry for any inconvenience that may have encountered. I'm sorry if there was any confusion in communication. Please forgive me if my actions have brought about disruption. I understand that this must be annoying. Apologies for any inconvenience you might have caused. Rest assured that we are doing our best to resolve the matter as promptly as possible. I'm truly sorry for any disruption you might have faced because of this circumstance.