I'm sorry for any trouble caused by the unexpected circumstances. My apologies for the disruption this may have caused. Please accept my deepest apologies for any disruption you might have encountered. Regrettably, we can't to meet your requirements currently. Apologies for any disappointment this may cause. Apologies for any trouble you may have encountered. I'm sorry if there were any confusion in communication. Kindly pardon me if my actions have brought about any inconvenience. I understand that this must be frustrating. Sorry for any frustration you might have elicited. Please be assured that we are doing our best to solve the matter as promptly as possible. I'm truly sorry for any disruption you may have faced because of this circumstance.