Thank You For Thank You for Negative Review
Dear {Customer},
Thank you for sharing your feedback. We're very sorry to hear you didn't have the best experience {with/at} {service/company}. We know how frustrating it can be when {issue that happened}. Rest assured we are looking into this issue and hope to resolve it ASAP. We will use your feedback to deliver a better experience next time.
Sincerely,
{Your Name}
{Your Role}