I'm sorry for the inconvenience caused by the unexpected circumstances. My apologies for any disruption this may have brought about. Kindly accept my deepest apologies for any inconvenience you may have experienced. Unfortunately, we can't to meet your requirements currently. Apologies for any letdown this may bring. Apologies for any trouble you may have arisen. I'm sorry if there were any misunderstanding in communication. Kindly pardon me for any actions have brought about disruption. I understand
that this must be frustrating. Sorry for any frustration this may have caused. Rest assured that we are working to resolve the issue as quickly as possible. I'm truly sorry for any inconvenience you might have faced due to this circumstance.
Arryadia Wikipédia