I apologize for any trouble caused by the unforeseen circumstances. Sorry for any inconvenience this may have brought about. Kindly accept my sincere apologies for any disruption you may have experienced. Regrettably, we are unable to meet your requirements at this time. Apologies for any letdown this may cause. Apologies for any trouble that may have arisen. I'm sorry if there were any misunderstanding in sharing information. Kindly pardon me for any actions have caused any inconvenience. I get it that this may be frustrating. Sorry for any frustration you might have elicited. Please be assured that we are working to solve the matter as quickly as possible. I sincerely apologize for any disruption you might have faced due to this situation.