You may cancel your order at no cost at any stage up until the order status of "Processing".
To submit a refund request, see How to submit a refund request?
Once the refund request is allowed, see How long do refunds take?
To learn about recalling and cancelling an order after it is processed, see Can I recall and cancel a processed/ completed transaction?
Kindly note that multiple cancellations of deposited orders may result in the permanent rejection of your account at the discretion of MoneyMatch management team.