Eroding consumer satisfaction

On the whole, the suppliers I used for my wedding were really good, really helped and generally bent over backwards in the run-up to the wedding. Unfortunately, a couple of them were unable to provide goods or services that had previously been agreed and was told they would refund me the cost of these. More than two months after the wedding, I am still chasing them. Their service was excellent otherwise, but despite appearing to be very happy to agree a refund when asked, their evasiveness now on providing it has completely eroded my positive opinions of their customer service.