Describe an acceptable response for the following customer complaints incorrect pricing or quotes - ( example : Apologise for the incorrect pricing.

Describe an acceptable response for the following customer complaints

1. incorrect pricing or quotes - ( example : Apologise for the incorrect pricing. And giving them some voucher or discount )
2. delays or errors in providing products or services
3. misunderstanding of customer requests
4. escalated complaints or disputes
5. other team members or suppliers not providing special requests
6. misunderstandings or communication barriers
7. unmet expectations of, or problems or faults with, a service or product