Send the transaction reference — the K code on the transaction page.
With it we can see exactly what the supplier was asked and what it answered. Without
it we are guessing.
Most connection problems are answered on the supplier's own guide. Find yours in the footer, or start from the supplier list. Never send us a supplier password. We cannot read one and we will never ask.
The API documentation carries the endpoints, the signing rules and every failure code. If something there is wrong or missing, tell us which page.
Mail the same address with what you found and how to reproduce it. Please give us a chance to fix it before you publish.
