If you are exchanging to a different size your order should not be affected (including price). While your requested size may be showing available before returning, we cannot guarantee that this will be available once the return reaches us. If your requested size is not available at the time that your return is processed, a refund will be provided back to your original method of payment.
For any promotion that requires you meet a minimum spend to obtain the promotion, your order must remain above this minimum spend even after returns are processed. If you are returning items that will drop your order total below the minimum spend you will normally forfeit your promotional discount or will be charged for any free items you have not returned.