If your previous order was cancelled due to a policy violation (e.g., multiple orders from the same customer/address within a month), you will not be able to participate in the exchange program until the policy allows for a new exchange (i.e., after the one-month period has elapsed from your last successful or cancelled attempt, assuming you meet all other eligibility criteria as an end-customer). Attempting to create new orders under the same details may result in further cancellations.