When trying to do a Bancontact (bcmc) payment, you may see a refused response with refusalReason NOT SUPPORTED. This means your integration is not ready for Bancontact payments yet.
{ "pspReference" : "882602876715274E", "refusalReason" : "NOT SUPPORTED", "resultCode" : "Refused" }
Since all Bancontact payments have to go through 3D Secure, we are doing an extra check to see if all required fields for 3D Secure are included in the request. Most likely, the browserInfo parameter is not included in your request. Please make sure to include this, and double check all steps provided on the Bancontact implementation guide.