Dear [Name],
I am writing to apologize for the breach of contract that occurred between us. I understand that this breach has caused you considerable inconvenience and I am truly sorry for that.
I take full responsibility for the breach of contract and I understand that I should have been more careful and taken more precautions to ensure that the contract was fulfilled. I understand that this breach has caused you to incur additional costs and I am deeply sorry for that.
I understand that this breach of contract has caused you to lose trust in me and I am deeply sorry for that. I understand that trust is essential in any business relationship and I have failed to uphold that trust. I am committed to regaining your trust and I will do whatever it takes to do so.
I understand that this breach of contract has caused you to suffer financial losses and I am deeply sorry for that. I understand that this breach of contract has caused you to suffer emotional distress and I am deeply sorry for that.
I am committed to making amends for the breach of contract and I am willing to do whatever it takes to make it right. I understand that this breach of contract has caused you to suffer losses and I am willing to compensate you for those losses.
I understand that this breach of contract has caused you to suffer inconvenience and I am deeply sorry for that. I understand that this breach of contract has caused you to suffer frustration and I am deeply sorry for that.
Once again, I apologize for the breach of contract and I am committed to making amends for it. I understand that this breach of contract has caused you considerable inconvenience and I am deeply sorry for that.
Sincerely,
[Your Name]