To open a dispute on Airbnb, go to the Resolution Centre within your Airbnb account and select the relevant booking. Choose whether you want to request money, send money, or report an issue, then describe the problem clearly and attach supporting evidence such as photos, messages or receipts. The other party has 72 hours to respond. If no agreement is reached within that window, you can escalate the case to Airbnb, who will review the evidence and make a final decision.