If a credit card is declined and your customer says it is a good card, please reach out directly to your merchant services provider. You should see the decline code on Vines OS but if you need further explanation on it, please reach out to your merchant provider. They should be able to see the transaction and explain the details. 

800.774.6462, Option 2
​support@openedgepay.com
Hours: 24/7/365
​

(800) 601-0230,  Option 3
​support@payjunction.com