When you contact us, explain what you were trying to do, what happened, and what you expected. If you can, tell us when it happened and which device and browser you were using.
A screenshot of the error or a case reference may help if you have one. Before sharing it, check that it does not show passwords, verification codes, or full card details. If you do not have a reference or screenshot, tell us what you know: this should not prevent you from asking a person for help.
If you already shared those details in the same conversation, you do not need to repeat them.