I apologize for any trouble caused by the unforeseen circumstances. Sorry for any inconvenience this may have caused. Kindly accept my deepest apologies for any disruption you may have experienced. Unfortunately, we can't to meet your requirements at this time. Sorry for any disappointment this may cause. Sorry for any trouble you may have encountered. I'm sorry if there was any misunderstanding in communication. Please forgive me if my actions have brought about any inconvenience. I get it that this must be annoying. Apologies for any inconvenience this may have elicited. Please be assured that we are working to solve the matter as quickly as possible. I'm truly sorry for any inconvenience you may have faced because of this circumstance.
