I'm sorry for any trouble caused by the unforeseen circumstances. Sorry for the disruption this may have brought about. Kindly accept my sincere apologies for any disruption you might have encountered. Unfortunately, we are unable to meet your requirements at this time. Apologies for any letdown this may cause. Sorry for any trouble that may have encountered. I apologize if there were any misunderstanding in communication. Kindly pardon me for any actions have brought about disruption. I get it that this may be frustrating. Sorry for any frustration this may have caused. Rest assured that we are doing our best to solve the matter as promptly as possible. I sincerely apologize for any inconvenience you may have faced because of this circumstance.