I'm sorry for any trouble caused by the unforeseen circumstances. My apologies for any disruption this may have caused. Please accept my deepest 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 bring. Apologies for any trouble that may have arisen. I apologize if there were any misunderstanding in sharing information. Please pardon me if my actions have caused disruption. I get it that this must be frustrating. Apologies for any frustration you might have elicited. Please be assured that we are doing our best to resolve the matter as promptly as possible. I'm truly sorry for any inconvenience you may have faced due to this situation.